參數(shù)資料
型號(hào): M34570
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 4 Bits CMOS Microcomputer(4位單片機(jī))
中文描述: 4位單片微機(jī)的CMOS(4位單片機(jī))
文件頁數(shù): 19/68頁
文件大?。?/td> 319K
代理商: M34570
19
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
TIMERS
The 4570 Group has the programmable timers and a fixed
dividing frequency timer.
G
Programmable timer
The programmable timer has a reload register and enables
the frequency dividing ratio to be set. It is decremented from a
set value n. When it underflows (count to n + 1), a timer interrupt
request flag is set to “1,” new data is loaded from the reload
register, and count continues (auto-reload function).
G
Fixed dividing frequency timer
The fixed dividing frequency timer has the fixed frequency
dividing ratio (n). An interrupt request flag is set to “1” every n
count of a count pulse.
Fig. 18 Auto-reload function
FF
16
n
00
16
n : Counter initial value
Count starts
Reload
Reload
1st underflow
2nd underflow
n+1 count
n+1 count
Time
An interrupt occurs or
a skip instruction is executed.
Timer 1 interrupt
request flag
T
“1”
“0”
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參數(shù)描述
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