PCA6408AHKX NXP Semiconductors, PCA6408AHKX Datasheet - Page 7

• Manufacturer Part Number: PCA6408AHKX
• Description: Interface - I/O Expanders 8bit IO Expander Low Voltage XQFN
• Manufacturer: NXP Semiconductors

Specifications of PCA6408AHKX

• Maximum Operating Frequency: 100 kHz
• Operating Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: XQFN-16
• Operating Current: 200 mA
• Output Current: 10 mA
• Product Type: I/O Expanders

NXP Semiconductors
Table 6.
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PCA6408A
Product data sheet
B7
0
0
0
0
Undefined.
B6
0
0
0
0
Command byte
Pointer register bits
B5
0
0
0
0
7.2 Interface definition
7.3 Pointer register and command byte
B4
0
0
0
0
B3
Table 5.
Following the successful acknowledgement of the address byte, the bus master sends a
command byte, which is stored in the Pointer register in the PCA6408A. Two bits of this
data byte state the operation (read or write) and the internal registers (Input, Output,
Polarity Inversion, or Configuration) that will be affected. This register is write only.
0
0
0
0
Byte
I
I/O data bus
2
Fig 6.
C-bus slave address
B2
0
0
0
0
Pointer register bits
B1
0
0
1
1
Interface definition
B0
All information provided in this document is subject to legal disclaimers.
0
1
0
1
Command byte
(hexadecimal)
Rev. 1 — 27 September 2012
7 (MSB)
00h
01h
02h
03h
P7
L
B7
B6
Low-voltage, 8-bit I
P6
H
6
Register
Input port
Output port
Polarity Inversion
Configuration
B5
B4
P5
5
L
B3
B2
P4
4
L
B1
002aaf540
Bit
2
C-bus and SMBus I/O expander
B0
P3
3
L
Protocol
read/write byte
read/write byte
read byte
read/write byte
P2
PCA6408A
2
L
© NXP B.V. 2012. All rights reserved.
ADDR
P1
1
0000 0000
Power-up
default
xxxx xxxx
1111 1111
1111 1111
0 (LSB)
R/W
P0
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