Serial External EEPROM

bangunprayogi · Jun 22, 2005

external eeprom

In EEPROM 24C64/24LC64 to PIC16F84A interfacing with I2C wire communication, should the A0,A1 and A2 are grounded?Then, how to refresh that serial external EEPROM?

throwaway18 · Jun 23, 2005

Read the datasheet.

The chip select bits
allow the use of up to eight 24XX64 devices on the
same bus and are used to select which device is
accessed. The chip select bits in the control byte must
correspond to the logic levels on the corresponding A2,
A1, and A0 pins for the device to respond.

If you only have one device then make them logic zero.

>how to refresh that serial external EEPROM?

What do you mean by refresh? It does not need a refresh cycle like a dynamic RAM.

IanP · Jun 25, 2005

EEProm doesn't need to be "refreshed" , and the three address line allow you to connect up to 8 similar devices to the same I2C interface ..
Regards,
IanP

power-twq · Jun 26, 2005

when your system has many 24C64 chips, A0, A1, A2 are used to

setup each chip's i2c address.

best regards

bangunprayogi said:
In EEPROM 24C64/24LC64 to PIC16F84A interfacing with I2C wire communication, should the A0,A1 and A2 are grounded?Then, how to refresh that serial external EEPROM?

ddt694 · Jun 26, 2005

eeprom is very easy to use.
the operation of read/write a eeprom is just like to operate a static ram.

Serial External EEPROM

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Serial External EEPROM

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