参数资料
型号: ST7FLITE09Y0B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP16
封装: 0.300 INCH, PLASTIC, DIP-16
文件页数: 58/115页
文件大小: 781K
代理商: ST7FLITE09Y0B3
ST7FLITE0
47/115
LITE TIMER (Cont’d)
Input Capture
The 8-bit input capture register is used to latch the
free-running upcounter after a rising or falling edge
is detected on the ICAP1 pin. When an input cap-
ture occurs, the ICF bit is set and the LTICR regis-
ter contains the MSB of the free-running up-
counter. An interrupt is generated if the ICIE bit is
set. The ICF bit is cleared by reading the LTICR
register.
The LTICR is a read only register and always con-
tains the data from the last input capture. Input
capture is inhibited if the ICF bit is set.
11.1.4 Low Power Modes
11.1.5 Interrupts
Note: The TBF and ICF interrupt events are con-
nected to separate interrupt vectors (see Inter-
rupts chapter).
They generate an interrupt if the enable bit is set in
the LTCSR register and the interrupt mask in the
CC register is reset (RIM instruction).
Figure 31. Input Capture Timing Diagram.
Mode
Description
SLOW
No effect on Lite timer (this peripheral
is driven directly by fOSC/32)
WAIT
No effect on Lite timer
HALT
No effect on Lite timer
Interrupt
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
Timebase
Event
TBF
TBIE
Yes
IC Event
ICF
ICIE
Yes
No
04h
8-bit COUNTER
t
01h
fOSC/32
xxh
02h
03h
05h
06h
07h
04h
LTIC PIN
ICF FLAG
LTICR REGISTER
CLEARED
4
s
(@ 8MHz fOSC)
fCPU
BY S/W
07h
READING
LTIC REGISTER
1
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