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參數(shù)資料
型號: PCA9536D,112
廠商: NXP Semiconductors
文件頁數(shù): 17/22頁
文件大小: 0K
描述: IC I/O EXPANDER I2C 4B 8SOIC
標準包裝: 100
接口: I²C,SM 總線
輸入/輸出數(shù): 4
中斷輸出:
頻率 - 時鐘: 400kHz
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SO
包裝: 管件
包括: POR
其它名稱: 935277415112
PCA9536D
PCA9536D-ND
PCA9536_5
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 05 — 25 January 2010
4 of 22
NXP Semiconductors
PCA9536
4-bit I2C-bus and SMBus I/O port
6.
Functional description
6.1 Registers
6.1.1 Command byte
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.
6.1.2 Register 0 - Input Port register
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, normally logic 1 when
no external signal externally applied because of the internal pull-up resistors.
Table 3.
Command byte
Command
Protocol
Function
0
read byte
Input Port register
1
read/write byte
Output Port register
2
read/write byte
Polarity Inversion register
3
read/write byte
Configuration register
Table 4.
Register 0 - Input Port register bit description
Legend: * default value
Bit
Symbol
Access
Value
Description
7
I7
read only
1*
not used
6
I6
read only
1*
5
I5
read only
1*
4
I4
read only
1*
3
I3
read only
X
determined by externally applied logic level
2
I2
read only
X
1
I1
read only
X
0
I0
read only
X
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