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參數(shù)資料
| 型號： | UPD17236 |
| 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(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 31/92頁 |
| 文件大小： | 378K |
| 代理商： | UPD17236 |
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Data Sheet U14360EJ1V0DS00
μ
PD17230, 17231, 17232, 17233, 17234, 17235, 17236
31
3.7
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
).
Figure 3-1. Relations between Port Register and Each Pin
Bank Address
Target Port
Bit
Output
Format
Read Contents
Written Contents
On Reset
Input mode Output mode Input mode Output mode
0
70H
Port 0A
b
3
P0A3
Input
Pin status
–
–
–
Input mode
(with pull-up
resistor)
b
2
P0A2
b
1
P0A1
b
0
P0A0
71H
Port 0B
b
3
P0B3
N-ch
open drain
Output latch Output latch Output latch
b
2
P0B2
b
1
P0B1
b
0
P0B0
72H
Port 0C
b
3
P0C3
Output mode
(low-level
output)
b
2
P0C2
b
1
P0C1
b
0
P0C0
73H
Port 0D
b
3
P0D3
b
2
P0D2
b
1
P0D1
b
0
P0D0
6FH
Port 0E
b
3
P0E3
CMOS
push-pull
Input mode
(without pull-
up resistor)
b
2
P0E2
b
1
P0E1
b
0
P0E0
1
70H
Port 1A
(input/output
mode set by
mask option)
b
0
P1A0
Input
(in input
mode)
–
–
–
Input mode
(without pull-
up resistor)
N-ch
open drain
(in output
mode)
–
Output latch Output latch Output latch Output mode
(high-
impedance
output)
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