- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69013 > M37512F8H-XXXHP 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 PDF資料下載
參數(shù)資料
| 型號： | M37512F8H-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 33/87頁 |
| 文件大小： | 879K |
| 代理商： | M37512F8H-XXXHP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁
Feb 18, 2005
page 39 of 85
REJ03B0122-0101
7512 Group
PULSE WIDTH MODULATION (PWM)
The 7512 Group has a PWM function with an 8-bit resolution,
based on a signal that is the clock input XIN or that clock input di-
vided by 2.
Data Setting
The PWM output pin also functions as port P44 or port P07. The
PWM output pin can be selected to either port P44/PWM0 or port
P07/PWM1 by bit 2 (PWM output pin selectoin bit) of the PWM
control register. 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)
= 63.75 (n+1)
s
(when f(XIN) = 4 MHz)
Output pulse “H” term = PWM period m / 255
= 0.25 (n+1) m
s
(when f(XIN) = 4 MHz)
Fig. 40 Timing of PWM period
Fig. 41 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.
63.75 m (n+1)
255
T = [63.75 (n+1)]
PWM output
m: Contents of PWM register
n : Contents of PWM prescaler
T : PWM period (when f(XIN) = 4 MHz
s
PWM
prescaler pre-latch
PWM
register pre-latch
Transfer control circuit
PWM
prescaler latch
PWM prescaler
PWM register
1/2
XIN
PWM enable bit
PWM register latch
Data bus
"1"
"0"
Count source
selection bit
Port P44 latch
PortP44/PWM0
PortP07/PWM1
PWM output pin selection bit
Port P07 latch
相關PDF資料 |
PDF描述 |
|---|---|
| M37512FCH-XXXHP | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| M37512F8HHP | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| M37513M8-XXXHP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP100 |
| M37513EFFS | 8-BIT, UVPROM, 4 MHz, MICROCONTROLLER, CQCC100 |
| M37513EFHP | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP100 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37512F8-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCHHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FCH-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37512FC-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
發(fā)布緊急采購，3分鐘左右您將得到回復。