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7733 bảng dữ liệu(PDF) 105 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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KEY INPUT INTERRUPT FUNCTION
7733 Group User’s Manual
5–2
KI2
KI1
KI0
P64/INT2
P63
P62
P61
P60
Key matrix
M37733MHBXXXFP
KI3
The key input interrupt function is used to generate an interrupt request when one of the input levels of four
or five pins falls. By using this function when terminating the stop or wait mode, the key-on wakeup can be
realized.
For the way to terminate the stop or wait mode, refer to section “17.4 Power saving.”
For the stop and wait modes, refer to chapter “11. STOP AND WAIT MODES.”
5.1 Overview
___
___
A key input interrupt request occurs when one of the input levels of pins KI0 to KI3 falls. Therefore, by
configuring an external key matrix shown in Figure 5.1.1, an interrupt request can be generated only by
___
___
pushing a key. Pins KI0 to KI3 can be pulled high by software and the same function can also be selected
___
___
for port P64. Therefore, when using the key input interrupt function, whether to use four pins (pins KI0 to KI3)
___
___
or five pins (pins KI0 to KI3 and P64) can be selected.
____
The key input interrupt and the INT2 interrupt share the same interrupt vector addresses and interrupt control
register.
5.1 Overview
Fig. 5.1.1 Key matrix example when key input interrupt function is used



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