参数资料
型号: ST7PL38F2MC/XXXE
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
封装: 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-20
文件页数: 126/168页
文件大小: 2955K
代理商: ST7PL38F2MC/XXXE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7L34, ST7L35, ST7L38, ST7L39
60/168
DUAL 12-BIT AUTORELOAD TIMER 3 (cont’d)
11.2.3.3 Input Capture Mode
The 12-bit ATICR register is used to latch the val-
ue of the 12-bit free running upcounter CNTR1 af-
ter a rising or falling edge is detected on the ATIC
pin. When an input capture occurs, the ICF bit is
set and the ATICR register contains the value of
the free running upcounter. An IC interrupt is gen-
erated if the ICIE bit is set. The ICF bit is reset by
reading the ATICRH/ATICRL register when the
ICF bit is set. The ATICR is a read only register
and always contains the free running upcounter
value which corresponds to the most recent input
capture. Any further input capture is inhibited while
the ICF bit is set.
Figure 42. Block Diagram of Input Capture Mode
Figure 43. Input Capture Timing Diagram
ATCSR
CK0
CK1
ICIE
ICF
12-bit AUTORELOAD REGISTER
12-bit UPCOUNTER1
fCPU
ATIC
12-bit INPUT CAPTURE REGISTER
IC INTERRUPT
REQUEST
ATR1
ATICR
CNTR1
(1ms
fLTIMER
@ 8 MHz)
timebase
OFF
COUNTER1
t
01h
fCOUNTER
xxh
02h
03h
04h
05h
06h
07h
04h
ATIC PIN
ICF FLAG
INTERRUPT
08h
09h
0Ah
INTERRUPT
ATICR READ
09h
1
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