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參數(shù)資料
| 型號(hào)： | M38039GCH-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 61/103頁 |
| 文件大?。?/td> | 1412K |
| 代理商： | M38039GCH-XXXHP |
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REJ03B0166-0113 Rev.1.13
Aug 21, 2009
Page 60 of 100
3803 Group (Spec.H QzROM version)
PULSE WIDTH MODULATION (PWM)
The 3803 group (Spec.H QzROM version) has PWM functions
with an 8-bit resolution, based on a signal that is the clock input
XIN or that clock input divided by 2 or the clock input XCIN or
that clock input divided by 2 in low-speed mode.
Data Setting
The PWM output pin also functions as port P56. Set the PWM
period 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, count source selection bit = “0”)
Output pulse “H” term = PWM period × m / 255
= 0.125 × (n+1) × m
s
(when f(XIN) = 8 MHz, count source selection bit = “0”)
PWM Operation
When bit 0 (PWM function 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.
Fig 49. Timing of PWM period
Fig 50. 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(XIN) = 8 MHz, count source selection bit = “0”)
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
(XCIN at low-
speed mode)
Port P56 latch
PWM function enable bit
Port P56
PWM prescaler
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|---|---|
| M38039G8H-XXXKP | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64 |
| M38039GCH-XXXKP | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64 |
| M38039GCH-XXXWG | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PBGA64 |
| M38039G8HKP | 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38049FFFP#U0 | 制造商:Renesas Electronics Corporation 功能描述: |
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| M3806 | 功能描述:電纜固定件和配件 LTSCG 625 BLACK RoHS:否 制造商:Heyco 類型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強(qiáng)度: |
| M3806 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 1000' |
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