ace24c16a ACE Technology Co., LTD., ace24c16a Datasheet - Page 6

• Manufacturer Part Number: ace24c16a
• Description: Two-wire Serial Eeprom
• Manufacturer: ACE Technology Co., LTD.

Device Operation
Clock and Data Transitions:
during SCL low time periods (refer to Figure 4). Data changes during SCL high periods will indicate a
start or stop condition as defined below.
Start Condition:
command (refer to Figure 5).
Stop Condition:
will place the EEPROM in a standby power mode (refer to Figure 5).
Acknowledge:
EEPROM sends a zero during the ninth clock cycle to acknowledge that it has received each word. The
happens during the ninth clock cycle. Following receipt each word from the EEPROM, the
microcontroller should send a zero to EEPROM and continue to output the next data word or send a
stop condition to finish the read cycle.
Standby Mode :
the receipt of the stop bit and the completion of any internal operations.
Device Reset :
following these steps:
1. Clock up to 9 cycles.
2. Look for SDA high in each cycle while SCL is high and then.
3. Create a start condition as SDA is high
Bus Timing
All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The
The ACE24C16A features a low-power standby mode which is enabled: (a) upon power-up and (b) after
After an interruption in protocol, power loss or system reset, any two-wire part can be protocol reset by
The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only
A high-to-low transition of SDA with SCL high is a start condition which must precede any other
A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command
Figure 2．SCL: Serial Clock, SDA: Serial Data I/O
Technology
Two-wire Serial EEPROM
ACE24C16A
VER 1.2
6