参数资料
型号: PCA9575PW1,118
厂商: NXP Semiconductors
文件页数: 4/38页
文件大小: 0K
描述: IC I/O EXPANDER I2C 16B 24TSSOP
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 16
中断输出:
频率 - 时钟: 400kHz
电源电压: 1.1 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 标准包装
包括: POR
其它名称: 568-9538-6
PCA9575_3
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 9 November 2009
12 of 38
NXP Semiconductors
PCA9575
16-bit I2C-bus and SMBus, level translating, low voltage GPIO
7.6.4 Register 3 - Polarity inversion port 1 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.
7.6.5 Register 4 - Bus-hold/pull-up/pull-down enable 0 register
Bit 0 of this register allows the user to enable/disable the bus-hold feature for the I/O pins.
Setting the bit 0 to logic 1 enables bus-hold feature for the I/O bank 0. In this mode, the
pull-up/pull-downs will be disabled for I/O bank 0. Setting the bit 0 to logic 0 disables
bus-hold feature.
Bit 1 of this register allows the user to enable/disable pull-up/pull-downs on the I/O pins.
Setting the bit 1 to logic 1 enables selection of pull-up/pull-down using Register 6. Setting
the bit 1 to logic 0 disables pull-up/pull-downs on the I/O bank 0 pins and contents of
Register 6 will have no effect on the I/O.
Table 7.
Register 3 - Polarity Inversion port 1 register (address 03h) bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
N1.7
R/W
0*
inverts polarity of Input port 1 register data
0 = Input port 1 register data retained (default value)
1 = Input port 1 register data inverted
6
N1.6
R/W
0*
5
N1.5
R/W
0*
4
N1.4
R/W
0*
3
N1.3
R/W
0*
2
N1.2
R/W
0*
1
N1.1
R/W
0*
0
N1.0
R/W
0*
Table 8.
Register 4 - Bus-hold/pull-up/pull-down enable 0 register (address 04h)
bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
E0.7
R/W
X
not used
6
E0.6
R/W
X
5
E0.5
R/W
X
4
E0.4
R/W
X
3
E0.3
R/W
X
2
E0.2
R/W
X
1
E0.1
R/W
0*
allows the user to enable/disable pull-up/pull-downs on the
I/O bank 0 pins
0 = disables pull-up/pull-downs on the I/O bank 0 pins and
contents of Register 6 will have no effect on the I/O bank 0
(default value)
1 = enables selection of pull-up/pull-down using Register 6
0
E0.0
R/W
0*
allows user to enable/disable the bus-hold feature for the
I/O bank 0 pins
0 = disables bus-hold feature (default value)
1 = enables bus-hold feature
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