PCA9505 NXP [NXP Semiconductors], PCA9505 Datasheet - Page 4

• Manufacturer Part Number: PCA9505
• Description: 40-bit I2C-bus I/O port with RESET, OE and INT
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA9505_9506_3
Product data sheet
Fig 2. Simplified schematic of IO0_0 to IO4_7
write configuration
write polarity
On power-up or RESET, all registers return to default values.
shift register
shift register
shift register
write pulse
read pulse
data from
data from
data from
pulse
pulse
I/O configuration
register
output port
register
D
CK
D
CK
Rev. 03 — 6 June 2007
Q
Q
Q
40-bit I
input port
register
polarity inversion
register
D
CK
D
CK
2
C-bus I/O port with RESET, OE and INT
Q
Q
configuration port register data (Cx[y])
output port register data (Ox[y])
Mx[y]
MANAGEMENT
INTERRUPT
PCA9505/06
100 k
© NXP B.V. 2007. All rights reserved.
ESD protection
diode
PCA9505
only
V
V
INT
input port
register data
(Ix[y])
polarity
register data
(Px[y])
DD
SS
002aab493
IOx_y
4 of 31