ACE24CP02C

I

2

C-Compatible Serial EEPROM

VER 1.1

8

Instructions

Write Operations

(A)

Byte Write

A write operation requires an 8-bit data word address following the device address word and

acknowledgment. Upon receipt of this address, the ACE24CP02C will again respond with a “0” and then

clock in the first 8-bit data word. Following receipt of the 8-bit data word, the ACE24CP02C will output a

“0” and the addressing device, such as a microcontroller, must terminate the write sequence with a stop

condition. And then the ACE24CP02C enters an internally timed write cycle, all inputs are disabled during

this write cycle and the ACE24CP02C will not respond until the write is complete (see Figure 7).

(B)

Page Write

A page write is initiated the same as a byte write, but the master does not send a stop condition after

the first data word is clocked in. Instead, after the ACE24CP02C acknowledges receipt of the first

data word, the master can transmit more data words. The ACE24CP02C will respond with a “0” after

each data word received. The microcontroller must terminate the page write sequence with a stop

condition.

The lower six bits of the data word address are internally incremented following the receipt of each

data word. The higher data word address bits are not incremented, retaining the memory page row

location. When the word address, internally generated, reaches the page boundary, the following

byte is placed at the beginning of the same page. If more than 64 data words are transmitted to the

ACE24CP02C, the data word address will roll-over, and previous data will be overwritten. The

address roll-over during write is from the last byte of the current page to the first byte of the same

page.

Figure7：Byte Write

Figure8：Page Write