DATA SHEET
S524A40X11/40X21/40X41/60X81/60X51 SERIAL EEPROM
PAGE WRITE OPERATION
The S524A40X11/40X21/40X41/60X81/60X51 can also perform 16-byte page write operation. A page write
operation is initiated in the same way as a byte write operation. However, instead of finishing the write operation
after the first data byte is transferred, the master can transmit up to 15 additional bytes. The
S524A40X11/40X21/40X41/60X81/60X51 responds with an ACK each time it receives a complete byte of data
(see Figure 1-10).
Start Slave Address
Word Address (n)
Data (n)
Data (
£
n + 15)
Stop
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
Figure 1-10. Page Write Operation
The S524A40X11/40X21/40X41/60X81/60X51 automatically increments the word address pointer each time it
receives a complete data byte. When one byte has been received, the internal word address pointer increments
to the next address and the next data byte can be received.
If the master transmits more than 16 bytes before it generates a stop condition to end the page write operation,
the S524A40X11/40X21/40X41/60X81/60X51 word address pointer value “rolls over” and the previously received
data is overwritten. If the master transmits less than 16 bytes and generates a stop condition, the
S524A40X11/40X21/40X41/60X81/60X51 writes the received data to the corresponding EEPROM address.
During a page write operation, all inputs are disabled and there is no response to additional requests from the
master until the internal write cycle is completed.
1-9
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