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ST7LITE1XB Datasheet(PDF) 66 Page - STMicroelectronics

Part # ST7LITE1XB
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI
PDF  157 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITE1XB Datasheet(HTML) 66 Page - STMicroelectronics

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DUAL 12-BIT AUTORELOAD TIMER 4 (Cont’d)
– At the second input capture on the falling edge of
the pulse, we assume that the values in the reg-
isters are as follows:
LTICR = LT2
ATICRH = ATH2
ATICRL = ATL2
Hence ATICR2 [11:0] = ATH2 & ATL2
Now pulse width P between first capture and sec-
ond capture will be:
P = decimal (F9 – LT1 + LT2 + 1) * 0.004ms + dec-
imal ((FFF * N) + N + ATICR2 - ATICR1 – 1) * 1ms
where N = No of overflows of 12-bit CNTR1.
Figure 46. Long Range Input Capture Timing Diagram
F9h
00h
LT1
F9h
00h
LT2
ATH1 & ATL1
00h
0h
LT1
ATH1
LT2
ATH2
fOSC/32
TB Counter1
CNTR1
LTIC
LTICR
ATICRH
00h
ATL1
ATL2
ATICRL
ATICR = ATICRH[3:0] & ATICRL[7:0]
_ _ _
_ _ _
_ _ _
_ _ _
_ _ _
_ _ _
ATH2 & ATL2
_ _ _
1



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