參數(shù)資料
型號: ST7FLIT19BF1U6TR
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, QCC20
封裝: LEAD FREE, QFN-20
文件頁數(shù): 106/153頁
文件大小: 2862K
代理商: ST7FLIT19BF1U6TR
ST7LITE1xB
56/153
11.2 DUAL 12-BIT AUTORELOAD TIMER 4 (AT4)
11.2.1 Introduction
The 12-bit Autoreload Timer can be used for gen-
eral-purpose timing functions. It is based on one or
two free-running 12-bit upcounters with an input
capture register and four PWM output channels.
There are 7 external pins:
– Four PWM outputs
– ATIC/LTIC pins for the Input Capture function
– BREAK pin for forcing a break condition on the
PWM outputs
11.2.2 Main Features
Single Timer or Dual Timer mode with two 12-bit
upcounters (CNTR1/CNTR2) and two 12-bit
autoreload registers (ATR1/ATR2)
Maskable overflow interrupts
PWM mode
– Generation of four independent PWMx signals
– Dead time generation for Half bridge driving
mode with programmable dead time
– Frequency 2kHz-4MHz (@ 8 MHz fCPU)
– Programmable duty-cycles
– Polarity control
– Programmable output modes
Output Compare Mode
Input Capture Mode
– 12-bit input capture register (ATICR)
– Triggered by rising and falling edges
– Maskable IC interrupt
– Long range input capture
Internal/External Break control
Flexible Clock control
One Pulse mode on PWM2/3
Force Update
Figure 34. Single Timer Mode (ENCNTR2=0)
PWM0
PWM1
PWM2
PWM3
Dead Time
Generator
PWM3 Duty Cycle Generator
12-bit Input Capture
PWM2 Duty Cycle Generator
PWM1 Duty Cycle Generator
PWM0 Duty Cycle Generator
12-Bit Autoreload Register 1
12-Bit Upcounter 1
Output Compare
CMP
Interrupt
OVF1 interrupt
Edge Detection Circuit
OE0
OE1
OE2
OE3
DTE bit
BPEN bit
Br
ea
k
Fu
nc
tio
n
ATIC
Clock
Control
fCPU
32MHz
Lite Timer
1 ms from
OFF
1
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