pca9672 NXP Semiconductors, pca9672 Datasheet - Page 3

• Manufacturer Part Number: pca9672
• Description: Pca9672 Remote 8-bit I/o Expander For Fm I?c-bus With Interrupt And Reset
• Manufacturer: NXP Semiconductors

NXP Semiconductors
5. Block diagram
PCA9672_2
Product data sheet
Fig 1. Block diagram of PCA9672
Fig 2. Simplified schematic diagram of P0 to P7
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
PCA9672
Remote 8-bit I/O expander for Fm+ I
FILTER
INPUT
POWER-ON
Rev. 02 — 6 July 2007
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
100 A
2
8 BITS
C-bus with interrupt and reset
I
I
OH
OL
002aac109
PORT
I/O
002aac321
PCA9672
© NXP B.V. 2007. All rights reserved.
V
P0 to P7
V
to interrupt logic
DD
SS
P0 to P7
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