参数资料
型号: PCA9575PW1,118
厂商: NXP Semiconductors
文件页数: 10/38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
18 of 38
NXP Semiconductors
PCA9575
16-bit I2C-bus and SMBus, level translating, low voltage GPIO
7.6.15 Register 14 - Interrupt status port 0 register
This register is read-only. It is used to identify the source of interrupt.
Remark: If the interrupts are masked, this register will return all zeros.
7.6.16 Register 15 - Interrupt status port 1 register
This register is read-only. It is used to identify the source of interrupt.
Remark: If the interrupts are masked, this register will return all zeros.
7.7 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the PCA9575 in
a reset condition until VDD has reached VPOR. At that point, the reset condition is released
and the PCA9575 registers and state machine will initialize to their default states. The
power-on reset typically completes the reset and enables the part by the time the power
supply is above VPOR. However, when it is required to reset the part by lowering the power
supply, it is necessary to lower it below 0.2 V.
7.8 RESET input
A reset can be accomplished by holding the RESET pin LOW for a minimum of tw(rst). The
PCA9575 registers and I2C-bus state machine will be held in their default state until the
RESET input is once again HIGH.
Table 18.
Register 14 - Interrupt status port 0 register (address 0Eh) bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
S0.7
read only
0*
identies source of interrupt
6
S0.6
read only
0*
5
S0.5
read only
0*
4
S0.4
read only
0*
3
S0.3
read only
0*
2
S0.2
read only
0*
1
S0.1
read only
0*
0
S0.0
read only
0*
Table 19.
Register 15 - Interrupt status port 1 register (address 0Fh) bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
S1.7
read only
0*
identies source of interrupt
6
S1.6
read only
0*
5
S1.5
read only
0*
4
S1.4
read only
0*
3
S1.3
read only
0*
2
S1.2
read only
0*
1
S1.1
read only
0*
0
S1.0
read only
0*
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