參數(shù)資料
型號: ST7PLITE05Y0B3
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, PDIP16
封裝: 0.300 INCH, PLASTIC, DIP-16
文件頁數(shù): 60/115頁
文件大?。?/td> 781K
代理商: ST7PLITE05Y0B3
ST7FLITE0
49/115
11.2 12-BIT AUTORELOAD TIMER (AT)
11.2.1 Introduction
The 12-bit Autoreload Timer can be used for gen-
eral-purpose timing functions. It is based on a free-
running 12-bit upcounter with a PWM output chan-
nel.
11.2.2 Main Features
s
12-bit upcounter with 12-bit autoreload register
(ATR)
s
Maskable overflow interrupt
s
PWM signal generator
s
Frequency range 2KHz-4MHz (@ 8 MHz fCPU)
– Programmable duty-cycle
– Polarity control
– Maskable Compare interrupt
s
Output Compare Function
Figure 32. Block Diagram
ATCSR
CMPIE
OVFI E
OVF
CK0
CK1
0
12-BIT AUTORELOAD VALUE
12-BIT UPCOUNTER
CMPF0 bit
CMPF0
CMP INTERRUPT
REQUEST
OVF INTERRUPT
REQUEST
fCPU
ATR
PWM
GENERATION
POL-
ARITY
OP0 bit
PWM0
COMP-
PARE
12-BIT DUTY CYCLE VALUE
fCOUNTER
fPWM
OUTPUT
CONTROL
OE0 bit
CNTR
(1 ms timebase
fLTIMER
DCR0H
DCR0L
Update on OVF Event
Preload
@ 8MHz)
70
on OVF Event
IF OE0=1
1
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