PCA9555N 查看數據表（PDF） - Philips Electronics
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PCA9555N Datasheet PDF : 22 Pages
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Philips Semiconductors
16-bit I2C and SMBus I/O port with interrupt
Product data sheet
PCA9555
BLOCK DIAGRAM
PCA9555
A0
A1
A2
SCL
SDA
VDD
VSS
INPUT
FILTER
POWER-ON
RESET
8-BIT
INPUT/
OUTPUT
PORTS
WRITE pulse
READ pulse
I/O1.0
I/O1.1
I/O1.2
I/O1.3
I/O1.4
I/O1.5
I/O1.6
I/O1.7
I2C/SMBUS
CONTROL
8-BIT
WRITE pulse
INPUT/
OUTPUT
PORTS
READ pulse
LP FILTER
I/O0.0
I/O0.1
I/O0.2
I/O0.3
I/O0.4
I/O0.5
I/O0.6
I/O0.7
VINT
INT
NOTE: ALL I/Os ARE SET TO INPUTS AT RESET
Figure 3. Block diagram
SU01439
2004 Sep 30
4
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