DVR-640H-S
113
5
7
8
5
6
7
8
C
D
F
A
B
E
PCA9557PW (MAIN ASSY : IC3802)
• 8Bit IIC to PARA IC
PIN LAYOUT
PIN FUNCTION
BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SCL
SDA
A0
A1
A2
I/O0
I/O1
V
SS
V
DD
RESET
I/O7
I/O6
I/O5
I/O4
I/O3
I/O2
Pin No.
Name
Function
1
SCL
Serial clock line
2
SDA
Serial data line
3
A0
Address input 0
4
A1
Address input 1
5
A2
Address input 2
6
I/O0
I/O0 (open drain)
7
I/O1
I/O1
8
V
SS
Supply ground
9
±
14
I/O2
±
I/O7
I/O2 to I/O7
15
RESET
Active-LOW reset input
16
V
DD
Supply voltage
POWER-ON
RESET
INPUT
FILTER
I
2
C/SMBus
CONTROL
INPUT/
OUTPUT
PORTS
WRITE pulse
READ pulse
A0
A1
A2
SCL
SDA
V
DD
V
SS
8-BIT
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
RESET
PCA9557
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9
9
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9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
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3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299