AK6004A_02 Datasheet, PDF (8/16 Pages) Asahi Kasei Microsystems – I2C bus 4K / 16Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6004A/08A]
ACKNOWLEDGE POLLING
Since the device will not acknowledge during the internal write cycle, this can be used to determine
when the cycle is complete. This feature (ACK polling) can be used to maximize bus throughput.
Once the stop condition is issued to indicate the end of the host's write operation the AK6004A/08A
initiates the internal write cycle. ACK polling can be initiated immediately. This involves issuing
the start condition followed by the slave address for a write operation. If the AK6004A/08A is still
busy with the write operation no ACK will be returned. If the AK6004A/08A has completed the
write operation an ACK will be returned and the host can then proceed with the next read or write
operation.
When the write operation is executed after the ACK polling, the host can issue the byte address
consecutively after the ACK is returned. When the read operation is executed after the ACK
polling, the host should issue the stop condition once.
Bus Activity:
Master
S
T
A SLAVE
R ADDRESS
T
SDA LINE S
Bus Activity:
AK6004A/08A
A
C
K
S
S
T
T
A SLAVE
O
R ADDRESS
P
T
P
S
A
C
K _{AK6004A/08A initiates}
the internal write cycle.
If the AK6004A/08A is still busy with the
write operation, no ACK will be returned.
If the AK6004A/08A has completed the
write operation, an ACK will be returned.
WRITE command
ACKNOWLEDGE POLLING
ACKNOWLEDGE POLLING
DAI01E-02
-8-
2002/11