MAX7310 Maxim, MAX7310 Datasheet - Page 13

• Manufacturer Part Number: MAX7310
• Description: The MAX7310 provides 8-bit parallel input/output port expansion for SMBus™-compatible and I²C-compatible applications
• Manufacturer: Maxim

Figure 9. Write to Output Port Register Through Write-Byte Protocol
Figure 10. Read Input Port Register Through Receive-Byte Protocol
WRITE FROM
FROM PORT
DATA OUT
DATA INTO
WRITE TO
PORT
PORT
PORT
SCL
SDA
SDA
START CONDITION
S
NOTE 1: THIS FIGURE ASSUMES THE COMMAND HAS PREVIOUSLY BEEN PROGRAMMED WITH 0x00.
NOTE 2: TRANSFER OF DATA CAN BE STOPPED AT ANY MOMENT BY A STOP CONDITION. WHEN THIS OCCURS,
1
0
START CONDITION
S1
2-Wire-Interfaced 8-Bit I/O Port Expander
2
A5
______________________________________________________________________________________
DATA PRESENT AT THE LAST ACKNOWLEDGED PHASE IS VALID (OUTPUT MODE). INPUT DATA IS LOST.
0
SLAVE ADDRESS
A4
3
A5
A3
4
SLAVE ADDRESS
A4
A2
5
A3
A1
6
A2
A0
7
A1
R/W
8
0
A0
t
PH
A
ACKNOWLEDGE
FROM SLAVE
9
R/W
1
0
A
ACKNOWLEDGE
FROM SLAVE
0
DATA 2
0
COMMAND BYTE
0
DATA FROM PORT
0
DATA 1
DATA 3
0
0
1
A
ACKNOWLEDGE
FROM SLAVE
t
PS
A
ACKNOWLEDGE
FROM MASTER
DATA TO PORT
DATA 1
DATA FROM PORT
DATA 4
DATA 4
with Reset
NO ACKNOWLEDGE
t
PV
FROM MASTER
A
ACKNOWLEDGE
FROM SLAVE
NA
DATA 1 VALID
P
STOP
CONDITION
P
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