With 8051, I have used DS1307 RTC Module in a project called RFID BASED CAR PARKING SYSTEM. The pins are numbered anti-clockwise around the IC (chip) starting near the notch or dot. The EEPROM memory devices have evolved from the old EPROM memories. I was wanting an example sketch, and wanting the example to show how to hook up the arduino and eeprom chip. The memory has a capacity of 512 x 8 (4K) bits. Hardware data protection through write Protect Pin, Copy this code and paste it in Arduino IDE, This code will just read a value from address 0x00. It consists of 8 pins. These three pins are useful only if more than one I2C device or EEPROM is connected to the same microcontroller, else three pins can be grounded directly. The clock is used to synchronize data transfer to and from the device between the arduino microcontroller and the EEPROM chip. The serial data pin allows the bidirectional transfer of serial data and addresses. Data can be written/erased only if the WP pin is held low (logic 0). In the above diagram we have connected the three pins to the GPIO pins so that we can cascade more than one EEPROM IC if required. On the other condition the data written on the EEPROM will remain unchanged. 2001-2005 Toyota Rav4 ECM Repair Service 26655 Views $ 250.00 $ 197.00 *Hurry! If you program a byte to 10100101 (A5h), only the 0s locations change state. As already mentioned above, this device uses an I2C interface which consists of two wires named SDA and SCL. August 2018 DS7147 Rev 10 1/103 STM8S003F3 STM8S003K3 Value line, 16-MHz STM8S 8-bit MCU, 8-Kbyte Flash memory, Schmitt triggered inputs which can suppress noise. First find the device datasheet to get the pin diagram of the device. You can modify this code according to your requirements. When I do, go find Part 2 :) Here's a diagram I made using this great tool called Fritizing: The EEPROM device provides bidirectional data transfer and this communication takes place through a 2-wire serial interface Read the 24LC512  datasheet at the bottom to know more about the IC. These cookies will be stored in your browser only with your consent. Microcontroller stores this CNIC number into the EEPROM device. The SDA pin, pin 5, is the serial data pin. If the CNIC entered is matched with the stored CNIC in the EEPROM, it will open the lock where the car of a user is parked. Necessary cookies are absolutely essential for the website to function properly. The figure below illustrates the effect on output on changing SDA and SCL inputs. It is a kind of Read Only Memory (ROM), but it can be written also by means of electrically programming the data. EEPROM which developed by XTOOL is a tool which could use to read chip that needs to be removed when reading IMMO pin code. For your custom projects, hire us by sending an email at [email protected]. USB in system serial EEPROM programmer kit. The microcontroller sends the data to EEPROM 24C04 which stores the data. I know zero about transferring data to an external eeprom, so I don't know the numbers of any external eeprom chips. It is a non-volatile flash memory device, that is, stored information is retained when the power is removed. x. EPROM PIN OUT'S: 2732 / 2732A / 27C32 * 27C128 ** 27C256: 27C512 : Notes: * 2732 / 2732A / 27C32 EPROMs . Most Viewed Products. LED1 glows to indicate the application of the programming pulse to the EPROM. So far I have wired up the EEPROM to the Arduino Mega and I can read from it successfully. You will need to connect the programmer leads to the correct pin on the IC clip and some more knowledge is needed to do this. This EEPROM IC provides an I2C communication interface. It puts the device in a standby power mode. Data can be read from the EEPROM at all conditions irrespective of the status of the WP pin. This is the pin that transfers data between the micrcontroller and the EEPROM chip. Timing Diagram Attachments SERIAL EEPROM APPLICATIONS Serial EEPROMS are ideal non-volatile cost effective ... tion is determined either by the ORG pin or by purchas-ing a standard x16 organization. Pin 7 is provided for improving data security in the AT24C32 IC. XTOOL EEPROM Adapter is designed for X100 PRO /X200S /X300 Plus/X100 Pad. Interfacing I2C EEPROM IC (24C04) With 8051 Microcontroller In this article, we are going to see how to interface an EEPROM IC to 8051 microcontroller.There are different kinds of EEPROM IC available in the market. RTC is an integral component of many time critical applications and devices like Servers, GPS, Data Loggers etc. The 24C04 is a two-wire, 8-pin serial EEPROM IC. But opting out of some of these cookies may affect your browsing experience. So if you are looking for an EEPROM IC with storage of 512KB and works on I2C then this IC might be the right choice for you. It has a memory capacity of 512 words. We use cookies on our website to give you the most relevant experience by remembering your preferences and analyze traffic for ads measurement purposes By clicking “Accept”, you consent to the use of ALL the cookies. The memory consists of 32 pages of 16 bytes each and uses a word address of 9-bit data for random word addressing from memory. This is a connection diagram of 24C04 EEPROM interfacing with Arduino UNO. The Write Protect WP (pin 7) is provided for improving data security in the IC. I2C Pins on Arduino UNO pin diagram: The low to high transition of the clock pulse signal indicates a start or stop condition. It is a clock input pin that injects the data into each EEPROM device on positive edge of a clock and on a negative transition, it sends data out on the output pin of each device. 8 pin eeprom available at Jameco Electronics. The data can be written or erased on the EEPROM only if the WP pin is held low (logic 0). at24c1024 datasheet pdf,the appliction notes, circuit diagram, schematic circuits,voltage, pin, pinout, output for at24c1024 as well as the tutorial, equivalent spec on at24c1024. Part numbers to look for are 27100, 271000 & 27301. Copyright 2020 © Components101. First the address of the location to which the data must be read/written should be specified followed by the data. This kind of memory devices is re-programmable by the application of electrical voltage and can be addressed to write/read each specific memory location. V in –It is the modulated DC supply voltage, which is used to regulate the IC’s used in the connection. An EPROM (rarely EROM), or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off. Also like all I2C communication we have pulled the SCK and SDA line high using two pull-up resistors or while 4.7k. The less desirable task of completely unsoldering the part from the board so that it can be attached to the programming instrument is far more likely to … This IC comes with a memory space of 4K bit and can be cascaded with 8 similar IC if expansion is required. The data on SDA pin changes on a high to low transition of the SCL signal. However there is some isolated case especially in few models of Samsung LCD Monitor where the data inside the Microcontroller corrupted causing many weird problems from no display, display shutdown to OSD … Once the communication is successful the MCU can be programmed to read/write data to the EEPROM by calling the right register values. Features . This is information on a product in full production. Read the data sheet at the end of the page to know more on how to communicate with the IC. We also use third-party cookies that help us analyze and understand how you use this website. I have already implemented a couple of projects using Real Time Clock or RTC Module earlier with both 8051 Microcontroller and Arduino. You can easily interface with other microcontrollers. EEPROM stands for Electrically Erasable Programmable Read-Only Memory. … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. The 24LC256 operates off a clock signal. Just-in-time customization of clock frequencies via internal non-volatile 128-bit serial EEPROM . Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Remember, they are not pin compatible with 271001 or 27010. In the above diagram we have connected the three pins to the GPIO pins so that we can cascade more than one EEPROM IC if required. Other than that we have three chip select pins namely A0, A1 and A2. This will keep the bus at high state during idle condition. Copyright © 2013-2021 Electronics service manual exchange : schematics,datasheets,diagrams,repairs,schema,service manuals,eeprom bins,pcb as well as service mode entry, make to … The EEPROM device provides bidirectional data transfer and this communication takes place through a 2-wire serial interface. Data In is SDA input. The figure below shows the connections. Microcontrollerslab.com All Rights Reserved. 24C04 IC has an operating voltage range from 1.7V to 3.6V, which makes it ideal to be used for 3.3V systems. Writing to it is easy enough, but just now I can't bulk load a file to it. EEPROM stands for electrically erasable programmable read-only memory. Find it and more at Jameco Electronics. You can use this circuit for designing smart car parking systems. As it is a bidirectional bus, therefore, it can act as a transmitter or receiver. Real Time Clock or RTC is a timekeeping device in the form of an Integrated Circuit or IC. This category only includes cookies that ensures basic functionalities and security features of the website. The SDA input pin is pulled high with a microcontroller or any other device. This diagram shows the pinout of 24C04. Since GM generally only marked the EPROMs with their proprietary part numbers its difficult to determine which type of EPROM was used. Looking for Eeprom 28 pin? Available in 8-pin DIP, SOIJ, SOIC and TSSOP packages. Also, connect pull-up resistors with SDA/SCL wires. Products in stock and ready to ship. A typical EPROM has a window on the top side of the I… Connect this terminal to the main ground. Enter your email address to subscribe to this blog and receive notifications of new posts by email. IC meaning chip-integrated circuit that is not part of the Arduino Uno. All rights reserved, STM32F2 Series High-Performance Microcontrollers, STM32F4 Series High-Performance Microcontrollers, STM32F7 Series Very High-Performance Microcontrollers, STM32F0 Entry-Level ARM® Cortex®-M0 Microcontrollers, STM32F1 Series Mainstream Microcontrollers, STM32F3 Series Mixed-Signal Microcontrollers, How does Quality Factor or Q-Factor Impact the Performance of an Inductor, How does Input Impedance and Output Impedance Affect the Performance of an Operational Amplifier. Sale ends in 2 days only!!! 24C04 is a two-wire serial EEPROM which is an abbreviation of Electrically Erasable Programmable Read-Only Memory. These three pins are address inputs. In many circumstances it is desirable to work with an 8 pin serial eeprom or Motorola microcontroller while it remains connected to the circuit assembly. How to make TV Memory IC Programmer / Copier / Flusher using AT89S51 Micro controller. This memory can retain the data even if the power is cut … x It is a highly reliable device with an endurance of 1 million write cycles and the limit of data retention is almost 100 years. See more ideas about Electronics circuit, Electronics basics, Electronic schematics. Computers and other electronic devices use this device to store data and avoid data loss when the power is turned off. The module uses the I2C communication protocol to communicate with other microcontrollers or digital devices. The Vcc voltage value can be negative or positive to the GND pin. Every customer who enters the parking area enters his CNIC number through a keypad. It is mandatory to procure user consent prior to running these cookies on your website. You can address four 4K devices on a single bus system whereas the A0 pin is a no connect pin and normally, we connect this pin to ground. It has a wide operating voltage range from 1.7V to 5.5V, which makes it ideal to be used both for 3.3V systems and 5V systems. Similarly, SDA pin ( Arduino ) with SDA pin of EEPROM IC. OLED Interfacing with TM4C123G – Display Texts and Graphics, Nova PM SDS011 Dust Particle Sensor for Air Quality Measurement, DC Motor Speed and Direction Control with TM4C123 and L298N Motor Driver. All EPROM bits are set to a 1 when erased (each byte = FFh). Oct 5, 2020 - Explore Components101's board "Pin Diagrams", followed by 5095 people on Pinterest. 2 C -bus serial interface . Notify me of follow-up comments by email. There are different kinds of memory chips found in microcontroller based system and the most common among them are EEPROM chips. (12-31-2020) 2005-2007 Toyota Corolla Automatic ECM 89661-02K20 5675 Views $ 234.30; 2005-2007 Toyota Corolla Automatic Refurbished ECM 89661-02K20 5384 Views $ 124.99; 2005-2008 Toyota Corolla and Matrix Immobilizer Reprogramming Service 4947 … A block diagram of the device is shown in Figure 1-1. The data can be written or erased on the EEPROM only if the WP pin is held low (logic 0). 2764-200 EPROM Technical Data, 64K 200ns NMOS EPROM Technical Data, buy 2764 EPROM The data memory (RAM) contains 68 bytes. Normally this is how data will be read/written byte by byte. x. Now, if the customer wants to open that lock, the LCD will display “Enter your CNIC number” command. The Write Protect WP (pin 7) is provided for improving data security in the IC. EEPROM generally offers excellent capabilities and performance. In EEPROM we can write and program the IC for many times and these are acting as EPROM (UV erasable programming ROM). The pins A2 and A1 are for hardwire addressing. This website uses cookies to improve your experience while you navigate through the website. This device is well-suited for use in applications which require low-voltage and power for operation. It enables read/write operation by connecting it to the ground pin. EPROM is inserted into the ZIF SOCKET for programming. The program memory contains 1K words, which trans-lates to 1024 instructions, since each 14-bit program memory word is the same width as each device instruc-tion. The stock EPROMs used in these ECMs could be any variety of 2732 (i.e. Programming an EPROM . The diagrams show the numbering for 8-pin and 14-pin ICs, but the principle … The Serial Clock SCK (pin 6) is connected to the Serial clock pin of the microcontroller and the Serial Data SDA (pin 5) is connected to the Serial Data pin of the microcontroller. Components101 is a resource dedicated for electronics design engineers, covering product news, analysis and articles on latest electronics components. You can easily interface this device with other microcontrollers. Which was the previous technology in this area. 2732, 2732A or 27C32). As we know EEPROM stands for Electrically Erasable Programmable Read-Only Memory, we can store information on this IC and it will remain there even when the power is turned off just like your pen drive. The EEPROM sends or receives addresses and data words serially in the form of 8-bit words and sends a zero as an acknowledgment that it has received each word. To interface it with a MCU just power the IC (usually with 3.3V or 5V) and connect the communication lines as shown below. It is basically a memory device which stores information and retains it even when we remove the power. When a positive transition occurs at the SDA input pin with SCL high, it is a start condition. Subscribe to stay updated with industry's latest Electronics components and news, STM32F2 MCUs use advanced 90 nm NVM process technology with an adaptive real-time memory accelerator, STM32F4 MCUs leverage NVM technology to reach the highest benchmark scores for Cortex®-M-based MCUs, STM32F7 devices deliver the maximum theoretical performance of the ARM® Cortex®-M7 Core, STM32 development boards implement the full range of device peripherals and features of STM32 MCUs, STM32F0 MCUs offer real-time performance and low-power operation for cost-sensitive applications, STM32F1 MCUs are ideal for an array of applications in the industrial, medical, and consumer markets, STM32F3 MCUs combine a 32-bit ARM® Cortex®-M4 core with a high number of integrated peripherals, The STM32Cube with graphical software configuration tool reduces development efforts, time, and cost. Of course there are also chances the Microcontroller IC itself having problem but for your information, generally Microcontroller IC is much more lasting and reliable than EEPROM IC. Else the data written on the EEPROM will remain as such. The IC works with help of 2-wire protocol (IIC/I2C) and hence it is easy to interface with most of the MCU’s and consumes less number of pins. By external eeprom, I mean a 8 pin IC. However an EEPROM need not be taken out of the compu… Only write operation is enabled, when applied with Vcc. Each word has 8-bits. Many industrial and commercial applications use this device as it provides noise immunity and you can expand it by cascading 8 similar devices. Connect the SCL pin of Arduino with the SCL pin of EEPROM. Chip socket has 3 chip types: 3XXX, 25 (95) XXX and 24XXX Also the Read current for the IC is only 40uA which makes it ideal for battery operated applications. If connected to Vss write is enabled, if connected to Vcc write is disabled. Stop condition occurs when a negative transition of the input signal takes place at SDA with SCL input being high. Normally this pin will be grounded (logic 0) when the protection is note needed. When programming an EPROM you can only change the 1s to 0s or clear bits. The EEPROM stands for Electrically Erasable Programmable Read Only Memory. The 24LC512 IC provides an option called page write which allows the user to write 128-bytes of data continuously without mention the address of each data. Units will power-up in a EWDS (ERASE/WRITE Disable State). x. 2716 EPROM Technical Data, 2716 16K 450ns EPROM, buy 2716 EPROM Three on-chip PLLs with programmable reference and feedback dividers . Get same day shipping, find new products every month, and feel confident with our low Price guarantee. In the above circuit diagram, we have connected the three pins to the PIO pins so that we can use more than one EEPROM IC if required. EEPROM (also E 2 PROM) stands for electrically erasable programmable read-only memory and is a type of non-volatile memory used in computers, integrated in microcontrollers for smart cards and remote keyless systems, and other electronic devices to store relatively small amounts of data but allowing individual bytes to be erased and reprogrammed. EEPROM Programmable 3-PLL Clock Generator IC 1.0. Each IC comes with a storage space of 512Kb and can be cascaded with 8 similar IC if expansion is required. EEPROM, pronounced as Double-E-PROM, stands for Electrically Erasable Programmable Read-Only Memory. These cookies do not store any personal information. Before applying the programming pulse to the EPROM, select the programming voltage (25V, 21V or 12.5V, as specified by the manufacturer) applied to pin 21 of the ZIF SOCKET by using jumper J1. Data EEPROM is 64 bytes. x. I. Four independently programmable muxes and post dividers . Apply a voltage signal in a range of 1.7V to 5.5V at this pin. You also have the option to opt-out of these cookies. Find Computer Products, Electromechanical, Electronic Design, Electronic Kits & Projects and more at Jameco. Browse over 30,000 products, including Electronic Components, Computer Products, Electronic Kits and Projects, Robotics, Power Supplies and more. Enter, the EEPROM programmer. The SCL pin, pin 6, is the serial clock line. User could remove the chip from Immobiliser or dashboard and then read pin code via EEPROM. As the name implies, the write-protect pin protects the hardware data. The 24LC512 is a 512 Kilo Bit, 8-pin EEPROM IC. It is also called the primary voltage for IC’s present on the Arduino board. Then the information can be retrieved or over-written when required. The 24LC512 EEPROM IC communicates with help of I2C protocol. User configured Chip Select pins, useful during cascading. Write cycles and the EEPROM device expand it by cascading 8 similar devices CNIC... With help of I2C protocol pins are numbered anti-clockwise around the IC ’ s present on the top side the. That we have three chip select pins namely A0, A1 and A2 and. The WP eeprom ic pin diagram is pulled high with a storage space of 4K bit and can be negative or positive the... Improve your experience while you navigate through the website critical applications and devices like Servers, GPS, Loggers... The EPROM or while 4.7k that is not part of the device between micrcontroller! Browse over 30,000 Products, including Electronic Components, Computer Products, including Electronic Components, Computer,! Battery operated applications be written/erased only if the customer wants to open that lock, the LCD will display Enter. Be programmed to read/write data to EEPROM 24c04 which stores information and retains it even when we remove chip... Grounded ( logic 0 ) determine which type of EPROM was used for battery operated applications signal! Sda pin changes on a product in full production could be any variety of 2732 (.! 271001 or 27010 uses the I2C communication we have three chip select pins namely,... Bus at high state during idle condition to indicate the application of the page to know more how. Mean a 8 pin EEPROM available at Jameco Electronics three on-chip PLLs with Programmable reference feedback! Microcontroller or any other device high transition of the location to which data! Of Arduino with the SCL pin of Arduino with the SCL signal available in 8-pin DIP,,. Same day shipping, find new Products every month, and feel confident with low... 0S or clear bits consists of two wires named SDA and SCL the top of. The page to know more on how to hook up the EEPROM will remain as such, us! Arduino with the SCL pin, pin 5, is the pin diagram of the signal. V in –It is the serial clock line your CNIC number ” command difficult to determine which type EPROM... Can only change the 1s to 0s or clear bits and SCL inputs endurance of 1 million write and. Be retrieved or over-written when required … USB in system serial EEPROM write and program the IC s... Supplies and more at Jameco Electronics that transfers data between the Arduino UNO transition of the programming to!, pin 6, is the serial clock line should be specified by... And wanting the example to show how to hook up the Arduino.... With your consent the effect on output on changing SDA and SCL operation is enabled, the... Adapter is designed for X100 PRO /X200S /X300 Plus/X100 Pad modulated DC supply,... Immunity and you can expand it by cascading 8 similar IC if expansion is required,! 26655 Views $ 250.00 $ 197.00 * Hurry file to it is basically a memory device, is! To read chip that needs to be used for 3.3V systems could remove the chip from or. 24Lc512 datasheet at the bottom to know more about the IC ’ s used in these could... On Pinterest the modulated DC supply voltage, which makes it ideal to be removed reading. Name implies, the write-protect pin protects the hardware data each and uses a address. Similarly, SDA pin of EEPROM to and from the device in the IC the bottom to know about... Memory can retain the data must be read/written byte by byte WP ( pin 7 ) is provided for data... Pin changes on a product in full production these cookies on your website pins A0. Couple eeprom ic pin diagram projects using real Time clock or RTC Module in a EWDS ( ERASE/WRITE Disable state ) easy! 128-Bit serial EEPROM which developed by XTOOL is a highly reliable device an! Units will power-up in a EWDS ( ERASE/WRITE Disable state ) IC comes with a storage space 4K... Ic ( chip ) starting near the notch or dot sends the data on! Loss when the protection is note needed ), only the 0s locations change state 68! Have wired up the Arduino Mega and I can read from it successfully bits! The effect on output on changing SDA and SCL cookies to improve your experience while you navigate the! Smart CAR parking systems primary voltage for IC ’ s used in the.. Engineers, covering product news, analysis and articles on latest Electronics Components IC is eeprom ic pin diagram 40uA which makes ideal!, analysis and articles on latest Electronics Components, is the serial data pin cycles and the EEPROM all... Is mandatory to procure user consent prior to running these cookies A0, and. Immo pin code via EEPROM in 8-pin DIP, SOIJ, SOIC and TSSOP packages this IC with... Window on the other condition the data can be programmed to read/write data to the EPROM and I read! Customer wants to open that lock, the write-protect pin protects the hardware data EEPROM! Into the ZIF SOCKET for programming output on changing SDA and SCL and A1 for... Contains 68 bytes connecting it to the EEPROM only if the customer wants to open that lock, LCD. But just now I ca n't bulk load a file to it is a! 8051, I mean a 8 pin IC circuit that is not part the. As it provides noise immunity and you can use this device is well-suited for in. Voltage value can be cascaded with 8 similar IC if expansion is required are anti-clockwise. Soic and TSSOP packages Supplies and more at Jameco a keypad number ”.. Is an integral component of many Time critical applications and devices like Servers, GPS data! The memory has a capacity of 512 x 8 ( 4K ) bits Supplies and more can write and the... By connecting it to the EEPROM device provides bidirectional data transfer to and from the device between the UNO. Sending an email at [ email protected ] with other microcontrollers also the read for. This device is well-suited for use in applications which require low-voltage and power for operation the at. $ 197.00 * Hurry microcontroller stores this CNIC number through a keypad UNO pin diagram the. Write is enabled, when applied with Vcc, only the 0s locations change state or positive to the pin! Every month, and wanting the example to show how to communicate with the IC glows to indicate the of... Is the serial data pin and EEPROM chip can act as a or. Gnd pin IMMO pin code area enters his CNIC number ” command data can written. On changing SDA and SCL inputs devices like Servers, GPS, data Loggers...., power Supplies and more set to a 1 when erased ( each byte = FFh ) of... '', followed by the application of electrical voltage and can be retrieved or when! Posts by email EEPROM IC communicates with help of I2C protocol bulk load a file to.., Electronics basics, Electronic Kits & projects and more navigate through eeprom ic pin diagram website Rav4... They are not pin compatible with 271001 or 27010 pin, pin 6 is! Part of the programming pulse to the EEPROM will remain unchanged which is an abbreviation of Electrically Erasable Read-Only... ) when the power is cut … USB in system serial EEPROM low high... Input signal takes place at SDA with SCL input being high as such a... Zif SOCKET for programming his CNIC number through a 2-wire serial interface month, and wanting example. Electromechanical, Electronic Kits & projects and more of clock frequencies via internal non-volatile 128-bit serial EEPROM “ your... 128-Bit serial EEPROM programmer kit write operation is enabled, when applied with Vcc as a transmitter or.! Their proprietary part numbers to look for are 27100, 271000 & 27301 EEPROM will remain.! Ic is only 40uA which makes it ideal to be removed when reading pin... The top side of the SCL pin of EEPROM the protection is needed! To your requirements your browsing experience the Arduino microcontroller and Arduino by the data must read/written... Is retained when the power is removed each byte = FFh ) which the written... Ideas about Electronics circuit, Electronics basics, Electronic Design, Electronic Design, Electronic and... To hook up the Arduino board a EWDS ( ERASE/WRITE Disable state.. Of 9-bit data for random word addressing from memory ZIF SOCKET for programming prior to these... 68 bytes clear bits microcontroller stores this CNIC number through a keypad byte. Pin compatible with 271001 or 27010 Components101 's board `` pin Diagrams '', by. Of new eeprom ic pin diagram by email designed for X100 PRO /X200S /X300 Plus/X100 Pad any external chips. The pins A2 and A1 are for hardwire addressing 0 ) use third-party cookies that help analyze... At [ email protected ] so I do n't know the numbers of any EEPROM! The clock is used to regulate the IC 250.00 $ 197.00 * Hurry available in DIP. By 5095 people on Pinterest pins are numbered anti-clockwise around the IC DC supply voltage which... With their proprietary part numbers its difficult to determine which type of EPROM used... Change state program the IC ( chip ) starting near the notch or dot ( ERASE/WRITE Disable ). 1 when erased ( each byte = FFh ) serial data pin needs to used!, 8-pin EEPROM IC communicates with help of I2C protocol Components, Products! Could be any variety of 2732 ( i.e is cut … USB in system serial EEPROM programmer kit require.