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參數(shù)資料
| 型號(hào)： | UPD753017A |
| 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(yè)數(shù)： | 27/88頁(yè) |
| 文件大小： | 438K |
| 代理商： | UPD753017A |
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27
μ
PD753012A, 753016A, 753017A
Data Sheet U11662EJ2V0DS00
6.5 Basic Interval Timer/Watchdog Timer
The basic interval timer/watchdog timer has the following functions.
Interval timer operation to generate a reference time interrupt
Watchdog timer operation to detect a runaway of program and reset the CPU
Selects and counts the wait time when the standby mode is released
Reads the contents of counting
Figure 6-4. Basic Interval Timer/Watchdog Timer Block Diagram
Note
Instruction execution
From clock
generator
f
X
/2
5
f
X
/2
7
f
X
/2
9
f
X
/2
12
MPX
BTM3 BTM2 BTM1 BTM0 BTM
4
SET1
Note
Internal bus
8
Basic interval timer
(8-bit frequency divider)
Clear
BT
Wait release signal
when standby is
released.
Set
Clear
3
WDTM
SET1
Note
Internal reset
signal
Vectored
interrupt
request signal
BT
interrupt
request flag
IRQBT
1
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