參數(shù)資料
型號: UPD17218
廠商: NEC Corp.
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機的小型通用紅外遙控器
文件頁數(shù): 25/84頁
文件大小: 350K
代理商: UPD17218
μ
PD17215, 17216, 17217, 17218
25
3.6
INT Pin
This pin inputs an external interrupt request signal. At either the rising or falling edge of the signal input to this pin, the
IRQ flag (RF: address 3EH, bit 0) is set.
The status of this pin can be read by using the INT flag (RF: address 0FH, bit 0). When the high level is input to the pin,
the INT flag is set to “1”; when the low level is input, the flag is reset to “0” (refer to 7.2.1 INT).
Fig. 3-1 Relations between Port Register and Each Pin
Bank Address
Bit
Port
Output Form
70H
Port 0A
Input only
0
71H
Port 0B
72H
Port 0C
N-ch
open-drain
(Output only)
73H
Port 0D
b
3
b
2
b
1
b
0
P0A
3
P0A
2
P0A
1
P0A
0
b
3
b
2
b
1
b
0
P0B
3
P0B
2
P0B
1
P0B
0
b
3
b
2
b
1
b
0
P0C
3
P0C
2
P0C
1
P0C
0
b
3
b
2
b
1
b
0
P0D
3
P0D
2
P0D
1
P0D
0
6FH
Port 0E
COMS
push-pull
b
3
b
2
b
1
b
0
P0E
3
P0E
2
P0E
1
P0E
0
Contents to Be Read
Input Mode
Output Mode
Pin status
Pin status
Output
latch
On Reset
Input mode
(w/pull-up resistor)
Output mode
(Low level output)
Input mode
(w/pull-up resistor)
Contents to Be Written
Input Mode
Output Mode
Output
latch
Output
latch
相關(guān)PDF資料
PDF描述
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