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| 型號(hào)： | M30240MC-XXXFP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, MICROCONTROLLER, PQFP80 |
| 封裝： | 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 55/125頁(yè) |
| 文件大小： | 753K |
| 代理商： | M30240MC-XXXFP |
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Mitsubishi microcomputers
M16C / 24 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
37
CONFIDENTIAL
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change
Key-Input Interrupt
2.14 Key-Input Interrupt
If the direction register of any of pin of Port0 or Port1 is set for input and a falling edge is input to that
port, a key-input interrupt is generated. A key-input interrupt can also be used as a key-on wakeup
function for cancelling the wait mode or stop mode. Figure 18 shows the block diagram of the key-input
interrupt.
Figure 18:
Block diagram of key input interrupt
(1) Enabling/disabling the key-input interrupt
The key-input interrupt can be enabled and disabled using the key-input interrupt register (004D16). The key-input
interrupt is affected by the interrupt priority level (IPL) and the interrupt enable ag (I ag).
(2) Occurrence timing of the key-input interrupt
With key-input interrupt acceptance enabled, ports P0 and P1, which are set to input, become key-input interrupt
pins (KI0 through KI15). A key-input interrupt occurs when a falling edge is input to a key-input interrupt pin. At this
moment, the level of other key-input interrupt pins must be “H”. No interrupt occurs when the level of any other key-
input interrupt pins is “L”.
(3) How to determine a key-input interrupt
A key-input interrupt occurs when a falling edge is input to one of 16 pins, but each pin has the same vector address.
Therefore, read the input level of ports P0 and P1 in the key-input interrupt routine to determine the interrupted pin.
(4) Registers related to the key-input interrupt
Figure 19 shows the memory map of key-input interrupt-related registers.
Figure 19:
Memory map of key-input interrupt-related registers
P1i/KIj
Port PXi
pull-up select bit
Port P1i
direction register
Pull-up
transistor
Interrupt control circuit
Key input interrupt control register
(address 004D16)
Key input
interrupt request
P0i/KIj
Port P0i
pull-up select bit
Port P0i
direction register
Pull-up
transistor
i=0~7; j=0~7
i=0~7; j=8~15
KIO
0
KIO
15
Key-input interrupt control register (KUPIC)
Port 0 (P0)
Port 1 (P1)
Port 0 direction register
Port 1 direction register
Pull-up control register 0
Pull- up control register 1
04D 16
3E0 16
3E1 16
3E2 16
3E3 16
3FC 16
3FD 16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M30240S1 | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30240S1-XXXFP | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30240S2 | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30240S2-XXXFP | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30240S3 | 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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