SN7325 Si-En, SN7325 Datasheet - Page 10

• Manufacturer Part Number: SN7325
• Description: Multi Function I/O Driver
• Manufacturer: Si-En

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Jan. 2009, Ver1.0
INTERNAL WRITE
t
IV
FROM PORT
DATA OUT
TO PORT
PORT
INT OUTPUT
SCL
S
SCL
SDA
1
1
START CONDITION
S
0
2
1
2
1
3
Slave Address
3
4
1
4
5
0
5
6
ACKNOWLEDGE
AD1 AD0
FROM SN7325
7
6
R/W ACKNOWLEDGE
0
Figure 6.Reading I/O Ports of SN7325
8
R/W
7
A
Figure 5.Writing to the SN7325
FROM SLAVE
1
t
Figure 4. Acknowledge
PSU
8
0
2
A
3
Command Byte
t
IR
t
PORT SNAPSHOT
PH
10
4
PP7
D7
1
5
PP6
D6
6
2
S=START CONDITION
P=STOP CONDITION
7
PP5
D5
3
8
PP4
D4
A
ACKNOWLEDGE
PORT I/O
4
FROM SLAVE
1
PP3
D3
5
2
PP2
3
D2
6
Data Byte
4
PP1
D1
SHADED=SLAVE TRANSMISSION
N=NOT ACKNOLEDGE
7
5
6
PP0
D0
8
7
SI-EN technology
N
8
ACKNOWLEDGE
FROM MASTER
A
ACKNOWLEDGE
t
PV
FROM SLAVE
P
SN7325
DATA VALID