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CAT24C21LI-T3 датащи(PDF) 6 Page - ON Semiconductor

номер детали CAT24C21LI-T3
подробное описание детали  1 kb Dual Mode Serial EEPROM for VESA ?쏱lug-and-Play?
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производитель  ONSEMI [ON Semiconductor]
домашняя страница  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CAT24C21LI-T3 датащи(HTML) 6 Page - ON Semiconductor

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CAT24C21
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Figure 6. Write Cycle Timing
STOP
CONDITION
START
CONDITION
ADDRESS
ACK
8th Bit
Byte n
SCL
SDA
tWR
Page Write
The CAT24C21 writes up to 16 bytes of data in a single
write cycle, using the Page Write operation. The Page Write
operation (Figure 11) is initiated in the same manner as the
Byte Write operation, however instead of terminating after
the initial word is transmitted, the Master is allowed to send
up to fifteen additional bytes. After each byte has been
transmitted the CAT24C21 will respond with an ACK, and
internally increment the low order address bits by one. The
high order bits remain unchanged.
If the Master transmits more than sixteen bytes prior to
sending the STOP condition, the address counter ‘wraps
around’, and previously transmitted data will be
overwritten.
Once all sixteen 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 CAT24C21 in a single write cycle.
Acknowledge Polling
The disabling of the inputs can be used to take advantage
of the typical write cycle time. Once the stop condition is
issued to indicate the end of the host’s write operation, the
CAT24C21 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 CAT24C21 is still busy with the write
operation, no ACK will be returned. If the CAT24C21 has
completed the write operation, an ACK will be returned and
the host can then proceed with the next read or write
operation.
Figure 7. Start/Stop Timing
START Bit
SDA
SCL
STOP Bit
Figure 8. Acknowledge Timing
ACKNOWLEDGE
1
START
SCL FROM
MASTER
89
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
Figure 9. Slave Address Bits
1
01
0
X
R/W
XX


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