- 您现在的位置：买卖IC网 > PDF目录80529 > M38207M8-XXXHP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80 PDF资料下载
参数资料
| 型号： | M38207M8-XXXHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 0.50 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 61/69页 |
| 文件大小： | 944K |
| 代理商： | M38207M8-XXXHP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页当前第61页第62页第63页第64页第65页第66页第67页第68页第69页
Rev.4.01
Nov 14, 2003
page 64 of 136
3803/3804 Group
PULSE WIDTH MODULATION (PWM)
The 3803/3804 group has PWM functions with an 8-bit resolution,
based on a signal that is the clock input XIN or that clock input di-
vided 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 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. 53 Timing of PWM period
Fig. 54 Block diagram of PWM function
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.
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
is f(XIN))
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
or
XCIN
Port P56 latch
PWM enable bit
Port P56
PWM prescaler
相关PDF资料 |
PDF描述 |
|---|---|
| M38254M4DXXXFP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| MB90341EPFV | MICROCONTROLLER, PQFP100 |
| MB90F345ESPF | MICROCONTROLLER, PQFP100 |
| M30102M2T-XXXFP | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP48 |
| M30302M8L-XXXGP | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M38207RFS | 制造商:Renesas Electronics Corporation 功能描述:EMULATION MCU/8BIT CMOS EMULATION CHIP - Bulk |
| M3821 BK001 | 制造商:Alpha Wire 功能描述:CBL 25COND 18AWG BLK 1000' |
| M3821 BK002 | 制造商:Alpha Wire 功能描述:CBL 25COND 18AWG BLK 500' |
| M3821 BK005 | 制造商:Alpha Wire 功能描述:CBL 25COND 18AWG BLK 100' |
| M38220E1DFP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
发布紧急采购，3分钟左右您将得到回复。