CAT1025 CATALYST [Catalyst Semiconductor], CAT1025 Datasheet - Page 11

• Manufacturer Part Number: CAT1025
• Description: Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM and Manual Reset
• Manufacturer: CATALYST [Catalyst Semiconductor]

Page Write
The CAT1024/25 writes up to 16 bytes of data in a single
write cycle, using the Page Write operation. The page
write operation is initiated in the same manner as the byte
write operation, however instead of terminating after the
initial byte is transmitted, the Master is allowed to send up
to 15 additional bytes. After each byte has been
transmitted, the CAT1024/25 will respond with an
acknowledge and internally increment the lower order
address bits by one. The high order bits remain
unchanged.
Figure 9. Page Write Timing
Figure 8. Byte Write Timing
BUS ACTIVITY:
SDA LINE
MASTER
S
S
A
R
T
T
BUS ACTIVITY:
ADDRESS
SDA LINE
SLAVE
MASTER
S
R
C
S
T
A
T
A
K
ADDRESS (n)
ADDRESS
SLAVE
BYTE
A
C
K
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C
K
11
ADDRESS
If the Master transmits more than 16 bytes before sending
the STOP condition, the address counter ‘wraps around,’
and previously transmitted data will be overwritten.
When all 16 bytes are received, and the STOP condition
has been sent by the Master, the internal programming
cycle begins. At this point, all received data is written to
the CAT1024/25 in a single write cycle.
DATA n
BYTE
A
C
K
C
A
K
DATA n+1
DATA
A
C
K
C
A
K
P
O
S
T
P
CAT1024, CAT1025
DATA n+15
Doc No. 3008, Rev. M
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