Philips SACD 1000/001 Service Manual page 106

GB 150 9. SACD 1000
9.25.4 Description of I2C controller PC8574
PC8574
Block Diagram
13
INT
1
A0
2
A1
3
A2
14
SCL
INPUT
15
FILTER
SDA
16
V DD
POWER-ON
8
V SS
RESET
Pin Function
SYMBOL
DIP16; SO16
A0
A1
A2
P0
P1
P2
P3
V
SS
P4
P5
P6
P7
INT
SCL
SDA
V
DD
n.c.
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Circuit-, IC descriptions and list of abbreviations
INTERRUPT
LP FILTER
LOGIC
PCF8574
2
I C BUS
SHIFT
CONTROL
8 BIT
REGISTER
WRITE pulse
READ pulse
PIN
SSOP20
1 6
2 7
3 9
4 10
5 11
6 12
7 14
8 15
9 16
10 17
11 19
12 20
13 1
14 2
15 4
16 5
- 3
- 8
- 13
- 18
4
P0
5
P1
6
P2
7
P3
I/O
9
PORT
P4
10
P5
11
P6
12
P7
DESCRIPTION
address input 0
address input 1
address input 2
quasi-bidirectional I/O 0
quasi-bidirectional I/O 1
quasi-bidirectional I/O 2
quasi-bidirectional I/O 3
supply ground
quasi-bidirectional I/O 4
quasi-bidirectional I/O 5
quasi-bidirectional I/O 6
quasi-bidirectional I/O 7
interrupt output (active LOW)
serial clock line
serial data line
supply voltage
not connected
not connected
not connected
not connected
Pin Configuration
V DD
A0 1 16
2 15
A1 SDA
A2
3 14 SCL
4 13
P0 INT
PCF8574
5 12
P1 P7
P2 6 11 P6
10
P3 7 P5
V SS
8 9 P4
CL 06532152_101.eps
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