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參數(shù)資料
| 型號： | M37515M4-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 24/54頁 |
| 文件大?。?/td> | 749K |
| 代理商： | M37515M4-XXXHP |
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M37515M4-XXXHP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PULSE WIDTH MODULATION (PWM)
The M37515M4-XXXHP has a PWM function with an 8-bit resolu-
tion, based on a signal that is the clock input XIN or that clock
input divided by 2.
Data Setting
The PWM output pin also functions as port P44. Set the PWM pe-
riod by the PWM prescaler, and set the “H” term of output pulse by
the PWM register.
If the value in the PWM prescaler is n and the value in the PWM
register is m (where n = 0 to 255 and m = 0 to 255) :
PWM period = 255 ! (n+1) / f(XIN)
= 31.875 ! (n+1)
s (when f(XIN) = 8 MHz)
Output pulse “H” term = PWM period ! m / 255
= 0.125 ! (n+1) ! m
s
(when f(XIN) = 8 MHz)
Fig. 31 Timing of PWM period
Fig. 32 Block diagram of PWM function
31.875 ! m ! (n+1)
255
s
T = [31.875 ! (n+1)]
s
PWM output
m: Contents of PWM register
n : Contents of PWM prescaler
T : PWM period (when f(X IN) = 8 MHz)
PWM Operation
When bit 0 (PWM enable bit) of the PWM control register is set to
“1”, operation starts by initializing the PWM output circuit, and
pulses are output starting at an “H”.
If the PWM register or PWM prescaler is updated during PWM
output, the pulses will change in the cycle after the one in which
the change was made.
Data bus
Count source
selection bit
“0”
“1”
PWM
prescaler pre-latch
PWM
register pre-latch
PWM
prescaler latch
PWM
register latch
Transfer control circuit
PWM register
1/2
XIN
Port P44 latch
PWM enable bit
Port P44
PWM prescaler
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37515T-PTC | 功能描述:FLX64(M3T-64DIP-DMS) TO 48-PIN . RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標準包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF) |
| M37516 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37516E1H-XXXKP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37516E1-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37516E1-XXXKP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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