參數(shù)資料
型號(hào)： ST7DALI
廠商： 意法半導(dǎo)體
元件分類： ADC
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI
中文描述： 8位單電壓閃存存儲(chǔ)器，數(shù)據(jù)EEPROM，模數(shù)轉(zhuǎn)換器，定時(shí)器，SPI和大理微控制器
文件頁數(shù)： 55/141頁
文件大?。?/td> 2175K
代理商： ST7DALI
ST7DALI
55/141
11.2 12-BIT AUTORELOAD TIMER 2 (AT2)
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 an input capture reg-
ister and four PWM output channels. There are 6
external pins:
– Four PWM outputs
– ATIC pin for the Input Capture function
– BREAK pin for forcing a break condition on the
PWM outputs
11.2.2 Main Features
■
12-bit upcounter with 12-bit autoreload register
(ATR)
■
Maskable overflow interrupt
■
Generation of four independent PWMx signals
■
Frequency 2KHz-4MHz (@ 8 MHz f
CPU
)
– Programmable duty-cycles
– Polarity control
– Programmable output modes
– Maskable Compare interrupt
■
Input Capture
– 12-bit input capture register (ATICR)
– Triggered by rising and falling edges
– Maskable IC interrupt
Figure 33. Block Diagram
ATCSR
CMPIE
OVFIE
OVF
CK0
CK1
ICIE
ICF
0
12-BIT AUTORELOAD REGISTER
12-BIT UPCOUNTER
CMPF3
CMPF2
CMPF0
CMP
INTERRUPT
REQUEST
OVF INTERRUPT
REQUEST
f
CPU
32 MHz
ATIC
12-BIT INPUT CAPTURE REGISTER
IC INTERRUPT
REQUEST
ATR
ATICR
f
COUNTER
CNTR
(1 ms
timebase
f
LTIMER
@ 8MHz)
CMPFx bit
P
POL-
ARITY
OPx bit
PWMx
COMP-
PARE
f
PWM
O
OEx bit
4 PWM Channels
DCR0H
Preload
DCR0L
Preload
on OVF Event
IF TRAN=1
12-BIT DUTY CYCLE VALUE (shadow)
1
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