PCA9534D,112 NXP Semiconductors, PCA9534D,112 Datasheet - Page 4

• Manufacturer Part Number: PCA9534D,112
• Manufacturer: NXP Semiconductors

Specifications of PCA9534D,112

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: SO
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
6. Functional description
PCA9534_3
Product data sheet
6.1.1 Command byte
6.1.2 Register 0 - Input Port register
6.1 Registers
Table 2.
[1]
Refer to
Table 3.
The command byte is the first byte to follow the address byte during a write transmission.
It is used as a pointer to determine which of the following registers will be written or read.
This register is a read-only port. It reflects the incoming logic levels of the pins, regardless
of whether the pin is defined as an input or an output by Register 3. Writes to this register
have no effect.
The default ‘X’ is determined by the externally applied logic level.
Symbol
IO6
IO7
INT
SCL
SDA
V
Command
0
1
2
3
DD
HVQFN package die supply ground is connected to both V
connected to supply ground for proper device operation. For enhanced thermal, electrical, and board level
performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad on the
board and for proper heat conduction through the board, thermal vias need to be incorporated in the PCB in
the thermal pad region.
Figure 1 “Block diagram of
Pin description
Command byte
Pin
SO16, TSSOP16
11
12
13
14
15
16
Protocol
read byte
read/write byte
read/write byte
read/write byte
Rev. 03 — 6 November 2006
…continued
8-bit I
HVQFN16
9
10
11
12
13
14
Function
Input Port register
Output Port register
Polarity Inversion register
Configuration register
2
C-bus and SMBus low power I/O port with interrupt
PCA9534”.
Description
input/output 6
input/output 7
interrupt output (open-drain)
serial clock line
serial data line
supply voltage
SS
pin and exposed center pad. V
PCA9534
© NXP B.V. 2006. All rights reserved.
SS
pin must be
4 of 25