
PCA9505_9506
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NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 4 — 3 August 2010
9 of 34
NXP Semiconductors
PCA9505/06
40-bit I2C-bus I/O port with RESET, OE and INT
7.3 Register definitions
Table 3.
Register summary
Register #
(hex)
D5
D4
D3
D2
D1
D0
Symbol
Access
Description
Input Port registers
00
000000
IP0
read only
Input Port register bank 0
01
000001
IP1
read only
Input Port register bank 1
02
000010
IP2
read only
Input Port register bank 2
03
000011
IP3
read only
Input Port register bank 3
04
000100
IP4
read only
Input Port register bank 4
05
000101
-
reserved for future use
06
000110
-
reserved for future use
07
000111
-
reserved for future use
Output Port registers
08
001000
OP0
read/write
Output Port register bank 0
09
001001
OP1
read/write
Output Port register bank 1
0A
001010
OP2
read/write
Output Port register bank 2
0B
001011
OP3
read/write
Output Port register bank 3
0C
001100
OP4
read/write
Output Port register bank 4
0D
001101
-
reserved for future use
0E
001110
-
reserved for future use
0F
001111
-
reserved for future use
Polarity Inversion registers
10
010000
PI0
read/write
Polarity Inversion register bank 0
11
010001
PI1
read/write
Polarity Inversion register bank 1
12
010010
PI2
read/write
Polarity Inversion register bank 2
13
010011
PI3
read/write
Polarity Inversion register bank 3
14
010100
PI4
read/write
Polarity Inversion register bank 4
15
010101
-
reserved for future use
16
010110
-
reserved for future use
17
010111
-
reserved for future use
I/O Configuration registers
18
011000
IOC0
read/write
I/O Configuration register bank 0
19
011001
IOC1
read/write
I/O Configuration register bank 1
1A
011010
IOC2
read/write
I/O Configuration register bank 2
1B
011011
IOC3
read/write
I/O Configuration register bank 3
1C
011100
IOC4
read/write
I/O Configuration register bank 4
1D
011101
-
reserved for future use
1E
011110
-
reserved for future use
1F
011111
-
reserved for future use