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參數(shù)資料
| 型號(hào)： | EM73290 |
| 廠(chǎng)商： | ELAN Microelctronics Corp . |
| 英文描述： | 4-Bit Micro-Controller for General-Purpose Product(用于家用電器，消費(fèi)類(lèi)產(chǎn)品和玩具控制器，工作電壓4.5V-5.5V的單片4位微控制器) |
| 中文描述： | 4位微控制器一般通用產(chǎn)品（用于家用電器，消費(fèi)類(lèi)產(chǎn)品和玩具控制器，工作電壓4.5V時(shí)至5.5V的單片4位微控制器） |
| 文件頁(yè)數(shù)： | 16/32頁(yè) |
| 文件大?。?/td> | 165K |
| 代理商： | EM73290 |
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16
* This specification are subject to be changed without notice.
7.17.1998
EM73290
4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
LDIA #01H;
STATAM;
LDIA #0FH;
STATAH;
LDIA #1000B;
OUTA P28; enable timerA with internal pulse rate: XIN/2
10
Hz
NOTE:
The preset value of timer/counter register is calculated as following procedure.
Internal pulse rate: XIN/2
10
; XIN = 4MHz
The time of timer counter count one = 2
10
/XIN = 1024/4000=0.256ms
The number of internal pulse to get timer overflow = 60 ms/ 0.256ms = 234.375 = 0EAH
The preset value of timer/counter register = 1000H - 0EAH = 0F16H
PULSE WIDTH MEASUREMENT MODE
For the pulse width measurement mode, the counter only incresed by the rising edge of internal pulse rate as
external timer/counter input (P8.1/TRGB, P8.3/TRGA ), interrupt request will be generated as soon as timer/
counter count overflow.
PROGRAM EXAMPLE:
Enable timerA by pulse width measurement mode .
LDIA #1100B;
OUTA P28; Enable timerA with event counter mode.
INTERRUPT FUNCTION
There are 5 interrupt sources, 2 external interrupt sources, 3 internal interrupt sources . Multiple
interrupts are admitted according the priority .
Type
Interrupt source
Priority
Interrupt
Latch
Interrupt
Enable condition
Program ROM
entry address
External External interrupt(INT0)
Internal
Reserved
Internal
TimerA overflow interrupt (TRGA) 3
Internal
TimerB overflow interrupt (TRGB) 4
Internal
Time base interrupt(TBI)
External External interrupt(INT1)
1
2
IL5
IL4
IL3
IL2 EI=1, MASK1=1
IL1
IL0
EI=1,MASK0=1 00CH
EI=1
EI=1, MASK3=1
EI=1, MASK2=1
002H
004H
006H
008H
00AH
5
6
STATAL;
Internal pulse
TimerB(TimerA) value
n
n+1
n+2
n+3
n+4
n+5
P8.1/TRGB(P8.3/TRGA)
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