参数资料
型号: PCA9535EMTTXG
厂商: ON Semiconductor
文件页数: 20/20页
文件大小: 0K
描述: 16-BIT I/O EXPANDER
标准包装: 3,000
接口: I²C 总线,SM 总线
输入/输出数: 16
中断输出:
频率 - 时钟: 100kHz
电源电压: 1.65 V ~ 5.5 V
工作温度: -55°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 24-WFQFN 裸露焊盘
供应商设备封装: 24-QFN(4x4)
包装: 带卷 (TR)
包括: *
PCA9535E, PCA9535EC
http://onsemi.com
9
REGISTERS
Command Byte
During a write transmission, the address byte is followed
by the command byte. The command byte determines which
of the following registers will be written or read.
Table 7. COMMAND BYTE
COMMAND
REGISTER
0
Input Port 0
1
Input Port 1
2
Output Port 0
3
Output Port 1
4
Polarity Inversion Port 0
5
Polarity Inversion Port 1
6
Configuration Port 0
7
Configuration Port 1
Registers 0 and 1: Input Port Registers
These registers are inputonly. They reflect the incoming
logic levels of the pins, regardless of whether the pin is
defined as an input or an output by Registers 6 or 7. Writes
to these registers have no effect.
The externallyapplied logic level determines the default
value ‘X’.
Table 8. INPUT PORT 0 REGISTER
Bit
7
6
5
4
3
2
1
0
Symbol
I0.7
I0.6
I0.5
I0.4
I0.3
I0.2
I0.1
I0.0
Default
X
Table 9. INPUT PORT 1 REGISTER
Bit
7
6
5
4
3
2
1
0
Symbol
I1.7
I1.6
I1.5
I1.4
I1.3
I1.2
I1.1
I1.0
Default
X
Registers 2 and 3: Output Port Registers
These registers are outputonly. They reflect the outgoing
logic levels of the pins defined as outputs by Registers 6 and
7. Bit values in these registers have no effect on pins defined
as inputs. In turn, reads from these registers reflect the values
that are in the flipflops controlling the output selection, not
the actual pin values.
Table 10. OUTPUT PORT 0 REGISTER
Bit
7
6
5
4
3
2
1
0
Symbol
O0.7
O0.6
O0.5
O0.4
O0.3
O0.2
O0.1
O0.0
Default
1
Table 11. OUTPUT PORT 1 REGISTER
Bit
7
6
5
4
3
2
1
0
Symbol
O1.7
O1.6
O1.5
O1.4
O1.3
O1.2
O1.1
O1.0
Default
1
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