pca9673 NXP Semiconductors, pca9673 Datasheet - Page 3
pca9673
Manufacturer Part Number
pca9673
Description
Remote 16-bit I/o Expander For Fm+ I2c-bus With Interrupt And Reset
Manufacturer
NXP Semiconductors
Datasheet
1.PCA9673.pdf
(33 pages)
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NXP Semiconductors
5. Block diagram
PCA9673_1
Product data sheet
Fig 1. Block diagram of PCA9673
Fig 2. Simplified schematic diagram of P00 to P17
RESET
data from Shift Register
SDA
AD0
AD1
SCL
V
V
INT
data to Shift Register
DD
SS
power-on reset
write pulse
read pulse
PCA9673
Remote 16-bit I/O expander for Fm+ I
FILTER
INPUT
Rev. 01 — 1 February 2007
POWER-ON
RESET
INTERRUPT
LOGIC
D
CI
CONTROL
I
FF
2
S
C-BUS
Q
D
CI
FF
S
REGISTER
write pulse
read pulse
Q
SHIFT
I
trt(pu)
LP FILTER
16 BITS
100 A
2
C-bus with interrupt and reset
I
I
OH
OL
002aab631
PORT
I/O
002aac300
PCA9673
© NXP B.V. 2007. All rights reserved.
V
P00 to P07
P10 to P17
V
to interrupt logic
DD
SS
P00 to P07
P10 to P17
3 of 33
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