参数资料
型号: MCP23S17T-E/SS
厂商: Microchip Technology
文件页数: 7/48页
文件大小: 0K
描述: IC I/O EXPANDER SPI 16B 28SSOP
标准包装: 2,100
接口: SPI
输入/输出数: 16
中断输出:
频率 - 时钟: 10MHz
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
供应商设备封装: 28-SSOP
包装: 带卷 (TR)
配用: MCP23X17EV-ND - BOARD EVAL FOR MCP23X17
GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
2007 Microchip Technology Inc.
DS21952B-page 15
MCP23017/MCP23S17
1.6.4
DEFAULT COMPARE REGISTER
FOR INTERRUPT-ON-CHANGE
The default comparison value is configured in the
DEFVAL register. If enabled (via GPINTEN and
INTCON) to compare against the DEFVAL register, an
opposite value on the associated pin will cause an
interrupt to occur.
REGISTER 1-4:
DEFVAL – DEFAULT VALUE REGISTER (ADDR 0x03)
R/W-0
DEF7
DEF6
DEF5
DEF4
DEF3
DEF2
DEF1
DEF0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-0
DEF7:DEF0: These bits set the compare value for pins configured for interrupt-on-change from
defaults <7:0>. Refer to INTCON.
If the associated pin level is the opposite from the register bit, an interrupt occurs.
Refer to INTCON and GPINTEN.
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