PT7C4307_13 Datasheet, PDF (14/15 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4307
Real-time Clock Module (I²C Bus)
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b) Simplified read
S
Slave address (7 bits)
Read ^A
11 0 1 00 0 1
A
Start _{Slave address + read specification}
C
K
bit bit bit bit bit bit bit bit
76543210
A ^{bit bit bit bit bit bit bit bit}
76543210
A
bit
7
bit
6
bit
5
bit
4
bit
3
bit
2
bit
1
bit
0
/
A
P
A
Data read (n)
C
Note: Data is read from the last one ^K
srored in the register pointer.
A
Data read (n+1)
C
K
Data read (n+x)
DATA TRANSFERRED
(X+1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED A NOT ACKNOWLEDGE(/A) SIGNAL
N Stop
O
A
C
K
Note:
1. The above steps are an example of transfers of one or two bytes only. There is no limit to the number of bytes transferred
during actual communications.
2. 49H, 4AH are used as test mode address. Customer should not use the addresses.
2013-06-0002
PT0206-5 06/18/13
14