Marantz SA12 - Description of I2 C Controller PC8574

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9.25.4 Description of I2C controller PC8574
PC8574
Block Diagram Pin Configuration
Pin Function
I C BUS
CONTROL
2
INPUT
FILTER
1
2
3
14
15
13
INTERRUPT
LOGIC
12
P7
11
P6
10
P5
9
P4
7
P3
6
P2
5
P1
4
P0
8 BIT
I/O
PORT
SHIFT
REGISTER
LP FILTER
WRITE pulse
READ pulse
POWER-ON
RESET
16
8
V
DD
V
SS
SDA
SCL
A2
A1
A0
INT
PCF8574
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
INT
A0
A1
A2
P0
P1
P2
P3
SDA
V
SS
SCL
P7
P6
P5
P4
V
DD
PCF8574
SYMBOL
PIN
DESCRIPTION
DIP16; SO16 SSOP20
A0 1 6 address input 0
A1 2 7 address input 1
A2 3 9 address input 2
P0 4 10 quasi-bidirectional I/O 0
P1 5 11 quasi-bidirectional I/O 1
P2 6 12 quasi-bidirectional I/O 2
P3 7 14 quasi-bidirectional I/O 3
V
SS
8 15 supply ground
P4 9 16 quasi-bidirectional I/O 4
P5 10 17 quasi-bidirectional I/O 5
P6 11 19 quasi-bidirectional I/O 6
P7 12 20 quasi-bidirectional I/O 7
INT 13 1 interrupt output (active LOW)
SCL 14 2 serial clock line
SDA 15 4 serial data line
V
DD
16 5 supply voltage
n.c. - 3 not connected
n.c. - 8 not connected
n.c. - 13 not connected
n.c. - 18 not connected
CL 06532152_101.eps
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