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參數(shù)資料
| 型號： | M37224M3-050SP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機電壓合成與屏幕顯示控制器 |
| 文件頁數(shù)： | 18/83頁 |
| 文件大?。?/td> | 901K |
| 代理商： | M37224M3-050SP |
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M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
18
TIMERS
The M37224M3-XXXSP has 4 timers: timer 1, timer 2, timer 3, and
timer 4. All timers are 8-bit timer with the 8-bit timer latch. The timer
block diagram is shown in Figure 17.
All of the timers count down and their divide ratio is 1/(n+1), where n
is the value of timer latch. By writing a count value to the correspond-
ing timer latch (addresses 00F0
16
to 00F3
16
), the value is also set to
a timer, simultaneously.
The count value is decremented by 1. The timer interrupt request bit
is set to “1” by a timer overflow at the next count pulse, after the
count value reaches “00
16
”.
(1) Timer 1
Timer 1 can select one of the following count sources:
f(X
IN
)/16
f(X
IN
)/4096
The count source of timer 1 is selected by setting bit 0 of the timer 12
mode register (address 00F4
16
).
Timer 1 interrupt request occurs at timer 1 overflow.
(2) Timer 2
Timer 2 can select one of the following count sources:
f(X
IN
)/16
Timer 1 overflow signal
External clock from the TIM2 pin
The count source of timer 2 is selected by setting bits 1 and 4 of
timer 12 mode register (address 00F4
16
). When timer 1 overflow
signal is a count source for timer 2, timer 1 functions as an 8-bit
prescaler.
Timer 2 interrupt request occurs at timer 2 overflow.
(3) Timer 3
Timer 3 can select one of the following count sources:
f(X
IN
)/16
External clock from the H
SYNC
pin
External clock from the TIM3 pin
The count source of timer 3 is selected by setting bits 0 and 5 of
timer 34 mode register (address 00F5
16
)
Timer 3 interrupt request occurs at timer 3 overflow.
(4) Timer 4
Timer 4 can select one of the following count sources:
f(X
IN
)/16
f(X
IN
)/2
Timer 3 overflow signal
The count source of timer 3 is selected by setting bits 1 and 4 of
timer 34 mode register (address 00F5
16
). When timer 3 overflow
signal is a count source for timer 4, timer 3 functions as an 8-bit
prescaler.
Timer 4 interrupt request occurs at timer 4 overflow.
At reset, timers 3 and 4 are connected by hardware and “FF
16
” is
automatically set in timer 3; “07
16
” in timer 4. The f(X
IN
)/16 is se-
lected as the timer 3 count source. The internal reset is released by
timer 4 overflow in this state and the internal clock is connected.
At execution of the STP instruction, timers 3 and 4 are connected by
hardware and “FF
16
” is automatically set in timer 3; “07
16
” in timer 4.
However, the f(X
IN
)/16 is not selected as the timer 3 count source.
So set bit 0 of timer 34 mode register (address 00F5
16
) to “0” before
execution of the STP instruction (f(X
IN
)/16 is selected as the timer 3
count source). The internal STP state is released by timer 4 overflow
in this state and the internal clock is connected.
As a result of the above procedure, the program can start under a
stable clock.
Timer-related registers are shown in Figures 15 and 16.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37224M3-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225ECSP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M6 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M8 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225MA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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