MAX7320 Maxim, MAX7320 Datasheet - Page 10

• Manufacturer Part Number: MAX7320
• Description: The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states
• Manufacturer: Maxim

I
Figure 5. Slave Address
Figure 6. Reading the MAX7320
Figure 7. Writing to the MAX7320
10
2
SDA
C Port Expander with Eight Push-Pull Outputs
SCL
______________________________________________________________________________________
FROM PORT
S = START CONDITION
P = STOP CONDITION
DATA OUT
SCL
S
SDA
SCL
MSB
1
1
START CONDITION
S
0
1
2
1
SLAVE ADDRESS
SHADED = SLAVE TRANSMISSION
N = NOT ACKNOWLEDGE
0
3
MAX7320 SLAVE ADDRESS
4
5
6
PORT SNAPSHOT DATA
1
7
R/W ACKNOWLEDGE
8
0
R/W
A
FROM SLAVE
A3
1
A
DATA TO PORT
PORT SNAPSHOT TAKEN
O7
D7
DATA 1
A2
O6
D6
O5
D5
t
PPV
A1
O4
D4
DATA 1
A
ACKNOWLEDGE
FROM SLAVE
O3
D3
PORT SNAPSHOT TAKEN
O2
D2
LSB
DATA TO PORT
A0
DATA 1 VALID
O1
D1
DATA 2
O0
D0
R/W
t
PPV
N
P
A
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM MASTER
DATA 2 VALID
ACK