参数资料
型号: PCA9534BS3,118
厂商: NXP Semiconductors
文件页数: 21/25页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16HVQFN
特色产品: NXP - I2C Interface
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 8
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: 16-VFQFN 裸露焊盘
供应商设备封装: 16-HVQFN
包装: 标准包装
包括: POR
其它名称: 568-8706-6
PCA9534_3
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 03 — 6 November 2006
5 of 25
NXP Semiconductors
PCA9534
8-bit I2C-bus and SMBus low power I/O port with interrupt
6.1.3 Register 1 - Output Port register
This register reects the outgoing logic levels of the pins dened as outputs by Register 3.
Bit values in this register have no effect on pins dened as inputs. Reads from this register
return the value that is in the ip-op controlling the output selection, not the actual pin
value.
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.
Table 4.
Register 0 - Input Port register bit description
Bit
Symbol
Access
Value
Description
7
I7
read only
X
determined by externally applied logic level
6
I6
read only
X
5
I5
read only
X
4
I4
read only
X
3
I3
read only
X
2
I2
read only
X
1
I1
read only
X
0
I0
read only
X
Table 5.
Register 1 - Output Port register bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
O7
R
1*
reects outgoing logic levels of pins dened as
outputs by Register 3
6O6
R
1*
5O5
R
1*
4O4
R
1*
3O3
R
1*
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*
inverts polarity of Input Port register data
0 = Input Port register data retained (default value)
1 = Input Port register data inverted
6
N6
R/W
0*
5
N5
R/W
0*
4
N4
R/W
0*
3
N3
R/W
0*
2
N2
R/W
0*
1
N1
R/W
0*
0
N0
R/W
0*
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