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7733 bảng dữ liệu(PDF) 108 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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7733 bảng dữ liệu(HTML) 108 Page - Renesas Technology Corp

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KEY INPUT INTERRUPT FUNCTION
7733 Group User’s Manual
5–5
(1) Port P6 pull-up selection bit (bit 5)
____
When using pin P64/INT2 as an input pin for the key input interrupt, set this bit to “1.” When this bit
____
is set to “1,” pin P64/INT2 is pulled high.
(2) Port P5 pull-up selection bit (bit 6)
___
___
This is a bit to pull pins KI0 to KI3 high. When configuring a key matrix, there is no need to connect
___
___
pull-up transistors externally if this bit is set to “1,” in other words, if pins KI0 to KI3 are set to be pulled
high.
(3) Key input interrupt selection bit (bit 7)
This is a bit to select the key input interrupt function.
____
The key input interrupt and the INT2 interrupt share the same interrupt vector addresses and interrupt
control register. When this bit is set to “1,” the key input interrupt function is selected. When this bit
____
= “1” and bit 5 (Port P6 pull-up selection bit) = “0,” pin P64/INT2 is a programmable I/O port. (At this
____
time, the INT2 interrupt cannot be used.) When both of this bit and bit 5 (Port P6 pull-up selection bit
____
1) are “1,” pin P64/INT2 can be used for the key input interrupt.
5.2 Block description



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