AT24C08C

AT24C08C is a 1,024words × 8 bits EEPROM(Electrically Erasable and Programmable Read-Only Memory) chip manufactured by Microchip Technology. This posting will provide the OSS-ECAL(Open Source Software for Electronic Components Abstraction Layer) for AT24C08C.
MCU interface : I2C

CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.

AT24C08C

General description

The AT24C08C provides 8,192 bits of Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 1,024 words of 8 bits each. The device’s cascading feature allows up to two devices (AT24C08C) to share a common Two-Wire bus. These devices are optimized for use in many industrial and commercial applications where low‑power and low‑voltage operations are essential. The devices are available in space-saving 8-lead SOIC, 8-lead TSSOP, 8-pad UDFN, 8-lead PDIP, 5-lead SOT23 and 8-ball VFBGA packages. All packages operate from 1.7V to 5.5V.

Feature
  • Low-Voltage Operation : VCC = 1.7V to 5.5V
  • Internally Organized as 1,024 x 8 (8K)
  • Industrial Temperature Range : -40°C to +85°C
  • I2C-Compatible (Two-Wire) Serial Interface : 100 kHz Standard mode, 1.7V to 5.5V, 400 kHz Fast mode, 1.7V to 5.5V, 1 MHz Fast Mode Plus (FM+), 2.5V to 5.5V
  • Schmitt Triggers, Filtered Inputs for Noise Suppression
  • Bidirectional Data Transfer Protocol
  • Write-Protect Pin for Full Array Hardware Data Protection
  • Ultra Low Active Current (3 mA maximum) and Standby Current (6 μA maximum)
  • 16-byte Page Write Mode : Partial page writes allowed
  • Random and Sequential Read Modes
  • Self-Timed Write Cycle Within 5 ms Maximum
  • ESD Protection > 4,000V
  • High Reliability : 1,000,000 write cycles, Data retention 100 years
  • Green Package Options (Lead-Free/Halide-Free/RoHS Compliant)
  • Die Sale Options: Wafer Form and Tape and Reel Available

OSS-ECAL specification

API Function

This product provides the following command API functions.

etSTS oAT24C08C_BYTE_WRITE( etCMP cmp, uint16 mem_adr, uint8 val )

Return value
Parameter IN

etSTS
etCMP cmp
uint16 mem_adr
uint8 val

OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Write data

Feature :
Command API function to write the value of val to the address specified by mem_adr.

Process :
1. Writes the value of val to the address specified in mem_adr.
2. Wait until measurement time iAT24C08C_WRITE_TIME[ms] has elapsed (return value eSTS_EXE while waiting).

Return value :
eSTS_FIN
eSTS_EXE
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT


NOTE :
iAT24C08C_WRITE_TIME[ms] Progress measurement is calculated from the Thread cycle that calls this API function, so please set the Thread cycle to THREAD_OSS_ECAL_PERIOD[ms].

etSTS oAT24C08C_PAGE_WRITE( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )

Return value
Parameter IN

etSTS
etCMP cmp
uint16 mem_adr
uint16 len
uint8* buf

OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Number of bytes to write (Max 16)
Data buffer to write

Feature :
Command API function that writes values from buf[0] to buf[len-1] in order from the address specified in mem_adr.

Process :
1. Write values from buf[0] to buf[len-1] in order from the address specified in mem_adr.
2. Wait until measurement time iAT24C08C_WRITE_TIME[ms] has elapsed (return value eSTS_EXE while waiting).

Return value :
eSTS_FIN
eSTS_EXE
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT


NOTE :
If mem_adr + len > 0bXXXXXX1111, the addresses A4 to A8 are fixed and A0 to A3 are rolled over to 0bXXXXXX0000.
iAT24C08C_WRITE_TIME[ms] Progress measurement is calculated from the Thread cycle that calls this API function, so please set the Thread cycle to THREAD_OSS_ECAL_PERIOD[ms].

etSTS oAT24C08C_CURRENT_READ( etCMP cmp, uint8* rlt )

Return value
Parameter IN
Parameter OUT

etSTS
etCMP cmp
uint8* rlt

OSS-ECAL status code
OSS-ECAL Components number codes
Read data

Feature :
Command API function to read 1Byte value from the last Read or Write address +1 and save it to rlt.

Process :
1. Read 1Byte value from the last read or write address + 1 and save it to rlt.

Return value :
eSTS_FIN
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT


NOTE :
If mem_adr + len > 0b1111111111, the addresses is rolled over to 0b0000000000.

etSTS oAT24C08C_RANDOM_READ( etCMP cmp, uint16 mem_adr, uint8* rlt )

Return value
Parameter IN

Parameter OUT

etSTS
etCMP cmp
uint16 mem_adr
uint8* rlt

OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Read data

Feature :
Command API function that reads 1 Byte worth of value from the address specified in mem_adr and saves it to rlt.

Process :
1. Read 1Byte worth of value from the address specified in mem_adr and save it to rlt.

Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT


NOTE :

etSTS oAT24C08C_SEQ_READ( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )

Return value
Parameter IN


Parameter OUT

etSTS
etCMP cmp
uint16 mem_adr
uint16 len
uint8* buf

OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Number of bytes to read
Data buffer to read

Feature :
Command API function that reads sequentially from the address specified in mem_adr and saves from buf[0] to buf[len-1].

Process :
1. Read in order from the address specified in mem_adr and save from buf[0] to buf[len-1].

Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT


NOTE :
If mem_adr + len > 0b1111111111, the addresses is rolled over to 0b0000000000.

etSTS oAT24C08C_WP_EN( etCMP cmp )

Return value
Parameter IN

etSTS
etCMP cmp

OSS-ECAL status code
OSS-ECAL Components number codes

Feature :
Command API function to write protect enable (write disable).

Process :
1. Write protect output as “Hi”.

Return value :
eSTS_FIN
eSTS_ERR_GPIO_OBJECT


NOTE :

etSTS oAT24C08C_WP_DIS( etCMP cmp )

Return value
Parameter IN

etSTS
etCMP cmp

OSS-ECAL status code
OSS-ECAL Components number codes

Feature :
Command API function to write protect disable (write enable).

Process :
1. Write protect output as “Low”.

Return value :
eSTS_FIN
eSTS_ERR_GPIO_OBJECT


NOTE :

Files
Folder*Filesummary
AT24C08C_HALNAME/samplesample.c (.cpp)Sample Application Program
sample.hSample Application Header
AT24C08C_HALNAMEoAT24C08C.c (.cpp)OSS-ECAL Program for AT24C08C
oAT24C08C.hOSS-ECAL Header for AT24C08C
oss_ecal.hOSS-ECAL Common Header (Ver 01.01.01 or later)
user_setting.c (.cpp)Const and Table of User setting
user_setting.hHeader of User setting
oHAL_i2c_stm32f4.cHAL Program for STM32Cube FW_F4
oHAL_i2c_stm32f4.hHAL Header for STM32Cube FW_F4
readme.mdReadme
OSS-ECAL Terms of Use.txtOSS-ECAL Terms of Use

* For HALNAME, please refer to HAL Support.

HAL Support List
MCU/Board
manufacturer
HALMCU*Development environment*HALNAME
ArduinoArduino 1.8.6ATmega2560
ATmega328P
Mega 2560 Rev3
Arduino Pro Mini 3.3V
ARDUINO
ARMMbed 6.17.0STM32F401RETxSTM32 Nucleo-64 boardsMBED
InfineonModusToolbox HAL Cat1 2.4.3CYBLE-416045-02CY8CPROTO-063-BLE PSoC 6 BLE Prototyping KitModusToolbox
NXPMCUXpresso SDK
iMXRT1051B_1052B
ksdk2_0
CYBLE-416045-02IMXRT1050-EVKBiMXRT1051B1052B
STMSTM32Cube FW_F4 V1.27.1STM32F401RETxSTM32 Nucleo-64 boardsSTM32F4
Debian ProjectDebian(Linux) v2022.04TI AM335xBeagleBone Black – Rev CLinux

* MCU and development environment at the time of development. Even if the same HAL is used, different MCUs and development environments may not work together.

OSS-ECAL Download

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Built-in How to

Please refer to the following to incorporate API functions into your user program.

Pin A2 should be set with the following code in user_setting.h.

// Device address Code bit2:A2
#define AT24C08C_1             0b00000000

For Infineon ModusToolbox HAL, set the I2C Timeout setting with the following code in user_setting.h. For details, see cyhal_i2c_master_write(), cyhal_i2c_master_read() Parameters timeout.

#define I2C_TIMEOUT             10U     // Timeout[ms] 

For STM32Cube FW_F4 HAL, I2C Timeout time is 25ms.

Note :
For the following command API functions, the Timeout time varies depending on the Read/Write data length len.
etSTS oAT24C08C_PAGE_WRITE( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )
etSTS oAT24C08C_SEQ_READ( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )

How to incorporate OSS-ECAL into user programs

How to incorporate multiple OSS-ECALs in a user program (same MCU function)

How to incorporate multiple OSS-ECALs in a user program (different MCU function)

How to incorporate multiple identical electronic components into a user program

How to reduce the impact on user programs by replacing electronic components

OSS-ECAL English
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