參數(shù)資料
型號(hào): 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): 119/153頁
文件大?。?/td> 2862K
代理商: ST7FLIT19BF1U6TR
ST7LITE1xB
68/153
DUAL 12-BIT AUTORELOAD TIMER 4 (Cont’d)
11.2.3.7 Force Update
In order not to wait for the counterx overflow to
load the value into active DCRx registers, a pro-
grammable counterx overflow is provided. For
both counters, a separate bit is provided which
when set, make the counters start with the over-
flow value, i.e. FFFh. After overflow, the counters
start counting from their respective auto reload
register values.
These bits are FORCE1 and FORCE2 in the
ATCSR2 register. FORCE1 is used to force an
overflow on Counter 1 and, FORCE2 is used for
Counter 2. These bits are set by software and re-
set by hardware after the respective counter over-
flow event has occurred.
This feature can be used at any time. All related
features such as PWM generation, Output Com-
pare, Input Capture, One-pulse etc can be used
this way.
Figure 49. Force Overflow Timing Diagram
FFF
ARRx
E04
E03
fCNTRx
CNTRx
FORCEx
FORCE2 FORCE1
ATCSR2 Register
1
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