参数资料
型号: MCP23008-E/ML
元件分类: 微控制器/微处理器
英文描述: 8 I/O, PIA-GENERAL PURPOSE, PQCC20
封装: 4 X 4 MM, 0.9 MM HEIGHT, PLASTIC, QFN-20
文件页数: 5/44页
文件大小: 649K
代理商: MCP23008-E/ML
2007 Microchip Technology Inc.
DS21919E-page 13
MCP23008/MCP23S08
1.6.4
DEFAULT COMPARE (DEFVAL)
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.
相关PDF资料
PDF描述
MCP23S08T-E/ML 8 I/O, PIA-GENERAL PURPOSE, PQCC20
MCP23S08T-E/SS 8 I/O, PIA-GENERAL PURPOSE, PDSO20
MCP23008-E/P 8 I/O, PIA-GENERAL PURPOSE, PDIP18
MCP23008T-E/SS 8 I/O, PIA-GENERAL PURPOSE, PDSO20
MCP23008-E/SS 8 I/O, PIA-GENERAL PURPOSE, PDSO20
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