參數(shù)資料
型號: ST72F321J9T5
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, PLASTIC, TQFP-44
文件頁數(shù): 132/176頁
文件大?。?/td> 1112K
代理商: ST72F321J9T5
ST72321J
59/176
PWM AUTO-RELOAD TIMER (Cont’d)
Output compare and Time base interrupt
On overflow, the OVF flag of the ARTCSR register
is set and an overflow interrupt request is generat-
ed if the overflow interrupt enable bit, OIE, in the
ARTCSR register, is set. The OVF flag must be re-
set by the user software. This interrupt can be
used as a time base in the application.
External clock and event detector mode
Using the fEXT external prescaler input clock, the
auto-reload timer can be used as an external clock
event detector. In this mode, the ARTARR register
is used to select the nEVENT number of events to
be counted before setting the OVF flag.
nEVENT = 256 - ARTARR
When entering HALT mode while fEXT is selected,
all the timer control registers are frozen but the
counter continues to increment. If the OIE bit is
set, the next overflow of the counter will generate
an interrupt which wakes up the MCU.
Figure 38. External Event Detector Example (3 counts)
COUNTER
t
FDh
FEh
FFh
FDh
OVF
ARTCSR READ
INTERRUPT
ARTARR=FDh
fEXT=fCOUNTER
FEh
FFh
FDh
IF OIE=1
INTERRUPT
IF OIE=1
ARTCSR READ
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ST72F321J9T6 功能描述:8位微控制器 -MCU Flash 60K SPI/SCI/I2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72F321J9TA 功能描述:8位微控制器 -MCU AUTO 8BIT MICRO RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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ST72F321J9TAS 制造商:STMicroelectronics 功能描述:
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