ace24lc02dm+ ACE Technology Co., LTD., ace24lc02dm+ Datasheet - Page 7

• Manufacturer Part Number: ace24lc02dm+
• Description: Two-wire Serial Eeprom
• Manufacturer: ACE Technology Co., LTD.

Device Addressing
the chip for a read or write operation (refer to Figure 7).
significant bits as shown. This is common to all the EEPROM devices.
compare to their corresponding hard-wired input pins (The A2, A1 and A0 device address bits are “0”
for the 2K EEPROM of SOT-23-5 package).
this bit is high and a write operation is initiated if this bit is low.
chip will return to a standby state.
Write Operations
Byte Write:
acknowledgment. Upon receipt of this address, the EEPROM will again respond with a zero and then
clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will output a
zero and the addressing device, such as a microcontroller, must terminate the write sequence with a
stop condition. At this time the EEPROM enters an internally timed write cycle, t
memory. All inputs are disabled during this write cycle and the EEPROM will not respond until the write
is complete (refer to Figure 8).
The 2K EEPROM devices all require an 8-bit device address word following a start condition to enable
The device address word consists of a mandatory one, zero sequence for the first four most
The next 3 bits are the A2, A1 and A0 device address bits for the 2K EEPROM. These 3 bits must
The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if
Upon a compare of the device address, the EEPROM will output a zero. If a compare is not made, the
A write operation requires an 8-bit data word address following the device address word and
Figure 5．Start and Stop Definition
Figure 6．Output Acknowledge
Technology
Two-wire Serial EEPROM
ACE24LC02DM+
WR,
to the nonvolatile
VER1.3
7