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| 型号： | MCP23017-E/SO |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16 I/O, PIA-GENERAL PURPOSE, PDSO28 |
| 封装： | 7.50 MM, PLASTIC, SOIC-28 |
| 文件页数： | 18/48页 |
| 文件大小： | 915K |
| 代理商： | MCP23017-E/SO |
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2007 Microchip Technology Inc.
DS21952B-page 25
MCP23017/MCP23S17
1.7.5
INTERRUPT CONDITIONS
There are two possible configurations that cause
interrupts (configured via INTCON):
1.
Pins configured for interrupt-on-pin change
will cause an interrupt to occur if a pin changes
to the opposite state. The default state is reset
after an interrupt occurs and after clearing the
interrupt condition (i.e., after reading GPIO or
INTCAP). For example, an interrupt occurs by
an input changing from ‘1’ to ‘0’. The new initial
state for the pin is a logic 0 after the interrupt is
cleared.
2.
Pins configured for interrupt-on-change from
register value will cause an interrupt to occur if
the corresponding input pin differs from the
register bit. The interrupt condition will remain as
long as the condition exists, regardless if the
INTCAP or GPIO is read.
See Figure 1-6 and Figure 1-7 for more information on
interrupt operations.
FIGURE 1-6:
INTERRUPT-ON-PIN
CHANGE
FIGURE 1-7:
INTERRUPT-ON-CHANGE
FROM REGISTER
DEFAULT
GPx
INT
ACTIVE
Port value
is captured
into INTCAP
Read GPIO
or INTCAP
Port value
is captured
into INTCAP
INT
Port value
is captured
into INTCAP
Read GPIU
or INTCAP
DEFVAL REGISTER
X
0
X
GP2
7
6
5
4
3
210
GP:
ACTIVE
(INT clears only if interrupt
condition does not exist.)
Pin
相关PDF资料 |
PDF描述 |
|---|---|
| MCP23S17T-E/SS | 16 I/O, PIA-GENERAL PURPOSE, PDSO28 |
| MCP23017T-E/SO | 16 I/O, PIA-GENERAL PURPOSE, PDSO28 |
| MCP23017-E/ML | 16 I/O, PIA-GENERAL PURPOSE, PQCC28 |
| MCP23S17-E/ML | 16 I/O, PIA-GENERAL PURPOSE, PQCC28 |
| MCP23S18-E/SO | PIA-GENERAL PURPOSE, PDSO28 |
相关代理商/技术参数 |
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| MCP23017T-E/ML | 功能描述:接口-I/O扩展器 16bit Input/Output Exp I2C interface RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MCP23017T-E/SO | 功能描述:接口-I/O扩展器 16bit Input/Output Exp I2C interface RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| MCP23017T-E/SP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16-Bit I/O Expander with Serial Interface |
| MCP23017T-E/SS | 功能描述:接口-I/O扩展器 16bit Input/Output Exp I2C interface RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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