- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383840 > ST7LITE19F1M6 ST7LITE1 - 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY.DATA EEPROM. ADC. 4 TIMERS. SPI PDF資料下載
參數(shù)資料
| 型號： | ST7LITE19F1M6 |
| 英文描述： | ST7LITE1 - 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY.DATA EEPROM. ADC. 4 TIMERS. SPI |
| 中文描述： | ST7LITE1 - 8單電壓閃存EEPROM的MEMORY.DATA位MCU。 ADC的。 4定時器。的SPI |
| 文件頁數(shù)： | 52/122頁 |
| 文件大?。?/td> | 1716K |
| 代理商： | ST7LITE19F1M6 |
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頁當(dāng)前第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頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁
ST7LITE0, ST7SUPERLITE
52/122
1
12-BIT AUTORELOAD TIMER
(Cont’d)
11.2.3 Functional Description
PWM Mode
This mode allows a Pulse Width Modulated sig-
nals to be generated on the PWM0 output pin with
minimum core processing overhead. The PWM0
output signal can be enabled or disabled using the
OE0 bit in the PWMCR register. When this bit is
set the PWM I/O pin is configured as output push-
pull alternate function.
Note:
CMPF0 is available in PWM mode (see
PWM0CSR description on
page 55
).
PWM Frequency and Duty Cycle
The PWM signal frequency (f
PWM
) is controlled by
the counter period and the ATR register value.
f
PWM
= f
COUNTER
/ (4096 - ATR)
Following the above formula, if f
CPU
is 8 MHz, the
maximum value of f
PWM
is 4 Mhz (ATR register
value = 4094), and the minimum value is 2 kHz
(ATR register value = 0).
Note:
The maximum value of ATR is 4094 be-
cause it must be lower than the DCR value which
must be 4095 in this case.
At reset, the counter starts counting from 0.
Software must write the duty cycle value in the
DCR0H and DCR0L preload registers. The
DCR0H register must be written first. See caution
below.
When a upcounter overflow occurs (OVF event),
the ATR value is loaded in the upcounter, the
preloaded Duty cycle value is transferred to the
Duty Cycle register and the PWM0 signal is set to
a high level. When the upcounter matches the
DCRx value the PWM0 signals is set to a low level.
To obtain a signal on the PWM0 pin, the contents
of the DCR0 register must be greater than the con-
tents of the ATR register.
The polarity bit can be used to invert the output
signal.
The maximum available resolution for the PWM0
duty cycle is:
Resolution = 1 / (4096 - ATR)
Note
: To get the maximum resolution (1/4096), the
ATR register must be 0. With this maximum reso-
lution and assuming that DCR=ATR, a 0% or
100% duty cycle can be obtained by changing the
polarity .
Caution:
As soon as the DCR0H is written, the
compare function is disabled and will start only
when the DCR0L value is written. If the DCR0H
write occurs just before the compare event, the
signal on the PWM output may not be set to a low
level. In this case, the DCRx register should be up-
dated just after an OVF event. If the DCR and ATR
values are close, then the DCRx register shouldbe
updated just before an OVF event, in order not to
miss a compare event and to have the right signal
applied on the PWM output.
Figure 34. PWM Function
DUTY CYCLE
REGISTER
(DCR0)
AUTO-RELOAD
REGISTER
(ATR)
P
t
4095
000
WITH OE0=1
AND OP0=0
WITH OE0=1
AND OP0=1
C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST890B | 1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN |
| ST890C | 1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN |
| ST890 | 1.2A CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN |
| ST8LR2 | PHOTOTRANSISTOR | NPN | 800NM PEAK WAVELENGTH | 20M | LED-2B |
| ST92R195C | ROMLESS HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST7LITE1XB | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI |
| ST7LITE1XB_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI |
| ST7LITE2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI |
| ST7LITE2_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI |
| ST7LITE20 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。