參數(shù)資料
型號： MCP23S08-E/ML
廠商： Microchip Technology
文件頁數(shù)： 14/44頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER SPI 8B 20QFN
標(biāo)準(zhǔn)包裝： 91
接口： SPI
輸入/輸出數(shù)： 8
中斷輸出： 是
頻率 - 時鐘： 10MHz
電源電壓： 1.8 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 20-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN 裸露焊盤（4x4）
包裝： 托盤
包括： POR
產(chǎn)品目錄頁面： 684 (CN2011-ZH PDF)
配用： GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
2007 Microchip Technology Inc.
DS21919E-page 21
MCP23008/MCP23S08
1.7
Interrupt Logic
The interrupt output pin will activate if an internal
interrupt occurs. The interrupt block is configured by
the following registers:
GPINTEN – enables the individual inputs
DEFVAL – holds the values that are compared
against the associated input port values
INTCON – controls if the input values are
compared against DEFVAL or the previous values
on the port
IOCON (ODR and INPOL) – configures the INT
pin as push-pull, open-drain and active-level
Only pins configured as inputs can cause interrupts.
Pins configured as outputs have no affect on INT.
Interrupt activity on the port will cause the port value to
be captured and copied into INTCAP. The interrupt will
remain active until the INTCAP or GPIO register is
read. Writing to these registers will not affect the
interrupt.
The first interrupt event will cause the port contents to
be copied into the INTCAP register. Subsequent
interrupt conditions on the port will not cause an
interrupt to occur as long as the interrupt is not cleared
by a read of INTCAP or GPIO.
1.7.1
INTERRUPT CONDITIONS
There are two possible configurations to 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. For example, an
interrupt occurs by an input changing from 1 to
0. The new initial state for the pin is a logic 0.
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
INTAP 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 GPIU
or INTCAP
Port value
is captured
into INTCAP
INT
Port value
is captured
into INTCAP
Read GPIU
or INTCAP
DEFVAL
X
0
X
GP2
7
6
5
4
3
210
GP:
ACTIVE
(INT clears only if interrupt
condition does not exist.)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP23S08T-E/ML 功能描述:接口-I/O擴展器 8bit Input/Output Exp SPI interface RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
MCP23S08T-E/P 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Bit I/O Expander with Serial Interface
MCP23S08T-E/SO 功能描述:接口-I/O擴展器 In/Out I2C int RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
MCP23S08T-E/SS 功能描述:接口-I/O擴展器 In/Out I2C int RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
MCP23S09 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Bit I/O Expander with Open-Drain Outputs
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