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4250 Datasheet(PDF) 21 Page - Renesas Technology Corp

Part # 4250
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  59 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4250 Datasheet(HTML) 21 Page - Renesas Technology Corp

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MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 18 Auto-reload function
FF16
n
0016
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
TIMERS
The 4250 Group has the programmable timer.
• Programmable timer
The programmable timer has a reload register and enables
the frequency dividing ratio to be set. It is decremented from a
setting 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).



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