ACE24AC16C

Two-wire Serial EEPROM

VER 1.1

4

Memory Organization

The ACE24AC16C devices have 128 pages. Since each page has 16 bytes, random word addressing to

ACE24AC16C will require 11 bits data word addresses.

Device Operation

A.

SERIAL CLOCK AND DATA TRANSITIONS

The SDA pin is typically pulled to high by an external resistor.

Data is allowed to change only when

condition as described below.

B.

START CONDITION

With SCL

commands must begin with a START condition.

C.

STOP CONDITION

With SCL

or write commands end with a STOP condition.

The device goes into the STANDBY mode if it is

after a read command. A STOP condition after page or byte write command will trigger the chip into

the STANDBY mode after the self- timed internal programming finish.

D.

ACKNOWLEDGE

The 2-wire protocol transmits address and data to and from the EEPROM in 8bit words. The

EEPROM acknowledges the data or address by outputting a "0" after receiving each word. The

ACKNOWLEDGE signal occurs on the 9th serial clock after each word.

E.

STANDBY MODE

The EEPROM goes into low power STANDBY mode after a fresh power up, after receiving a STOP

bit in read mode, or after completing a self-time internal programming operation.

F.

SOFT RESET

After an interruption in protocol power loss or system reset, any two-wire part can be reset by

following these steps:

1. Creat a START condition,

2. Clock eighteen data bits

“1”,

3. Creat a start condition as SDA is high.