AWG G3 PAD FOR PS3 Spécifications Page 272

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X24C04
Characteristics subject to change without notice.
5 of 13
REV 1.1 7/12/00
www.xicor.com
NOT RECOMMENDED
FOR NEW DESIGNS
Figure 5. Byte Write
Bus Activity:
Master
SDA Bus
Bus Activity:
X24C04
S
T
A
R
T
Slave
Address
S
T
O
P
A
C
K
A
C
K
A
C
K
Word Address
Data
P
S
Page Write
The X24C04 is capable of a sixteen byte page write
operation. It is initiated in the same manner as the byte
write operation, but instead of terminating the write
cycle after the first data word is transferred, the master
can transmit up to fifteen more words. After the receipt
of each word, the X24C04 will respond with an
acknowledge.
After the receipt of each word, the four low order
address bits are internally incremented by one. The
high order five bits of the address remain constant. If
the master should transmit more than sixteen words
prior to generating the stop condition, the address
counter will “roll over” and the previously written data
will be overwritten. As with the byte write operation, all
inputs are disabled until completion of the internal write
cycle. Refer to Figure 6 for the address, acknowledge
and data transfer sequence.
Figure 6. Page Write
S
T
A
R
T
Slave
Address
S
T
O
P
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
Data n + 1
Word
Address (n)
Data n
S
P
Data n + 15
Note: In this example n = xxxx 000 (B); x = 1 or 0
Bus Activity:
Master
SDA Line
Bus Activity:
X24C04
Acknowledge Polling
The disabling of the inputs can be used to take advan-
tage of the typical 5 ms write cycle time. Once the stop
condition is issued to indicate the end of the host’s
write operation, the X24C04 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 X24C04 is still
busy with the write operation no ACK will be returned.
If the X24C04 has completed the write operation an
ACK will be returned, and the host can then proceed
with the next read or write operation. Refer to Flow 1.
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