参数资料
型号: PCA9536DP/DG,118
厂商: NXP Semiconductors
文件页数: 18/22页
文件大小: 0K
描述: IC I/O EXPANDER I2C 4B 8TSSOP
特色产品: NXP - I2C Interface
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 4
中断输出:
频率 - 时钟: 400kHz
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-TSSOP
包装: 标准包装
包括: POR
其它名称: 568-8252-6
PCA9536_5
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 05 — 25 January 2010
5 of 22
NXP Semiconductors
PCA9536
4-bit I2C-bus and SMBus I/O port
6.1.3 Register 1 - Output Port register
This register reflects the outgoing logic levels of the pins defined as outputs by Register 3.
Bit values in this register have no effect on pins defined as inputs. Reads from this register
return the value that is in the flip-flop controlling the output selection, not the actual pin
value.
‘Not used’ bits can be programmed with either logic 0 or logic 1.
6.1.4 Register 2 - Polarity Inversion register
This register allows the user to invert the polarity of the Input Port register data. If a bit in
this register is set (written with ‘1’), the corresponding Input Port data is inverted. If a bit in
this register is cleared (written with a ‘0’), the Input Port data polarity is retained.
‘Not used’ bits can be programmed with either logic 0 or logic 1.
Table 5.
Register 1 - Output Port register bit description
Legend: * default value
Bit
Symbol
Access
Value
Description
7
O7
R
1*
not used
6O6
R
1*
5O5
R
1*
4O4
R
1*
3
O3
R
1*
reflects outgoing logic levels of pins defined as
outputs by Register 3
2O2
R
1*
1O1
R
1*
0O0
R
1*
Table 6.
Register 2 - Polarity Inversion register bit description
Legend: * default value
Bit
Symbol
Access
Value
Description
7
N7
R/W
0*
not used
6N6
R/W
0*
5N5
R/W
0*
4N4
R/W
0*
3
N3
R/W
0*
inverts polarity of Input Port register data
0 = Input Port register data retained (default
value)
1 = Input Port register data inverted
2N2
R/W
0*
1N1
R/W
0*
0N0
R/W
0*
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