Datasheet

MAX7320
I
2
C Port Expander with Eight Push-Pull Outputs
10 ______________________________________________________________________________________
SDA
SCL
0
MSB
LSB
ACK1A11A3A0A2 R/W
Figure 5. Slave Address
S
SCL
N
P
11 0 1 MAX7320 SLAVE ADDRESS
PORT SNAPSHOT DATA
PORT SNAPSHOT TAKEN PORT SNAPSHOT TAKEN
ACKNOWLEDGE
FROM MASTER
R/W
A D7 D6 D5 D4 D2 D1 D0D3
O7 O6 O5 O4
DATA 1
O3 O2 O1 O0
S = START CONDITION
P = STOP CONDITION
SHADED = SLAVE TRANSMISSION
N = NOT ACKNOWLEDGE
Figure 6. Reading the MAX7320
SCL
SDA
START CONDITION R/W ACKNOWLEDGE
FROM SLAVE
SLAVE ADDRESS
S0
12345678
AAA
t
PPV
DATA 1 DATA 2
DATA 2 VALIDDATA 1 VALID
DATA OUT
FROM PORT
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
t
PPV
DATA TO PORT DATA TO PORT
Figure 7. Writing to the MAX7320