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ST7LITE39 Datasheet(PDF) 71 Page - STMicroelectronics

Part # ST7LITE39
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH, DATA EEPROM, ADC, TIMERS, SPI, LINSCI
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITE39 Datasheet(HTML) 71 Page - STMicroelectronics

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11.3 LITE TIMER 2 (LT2)
11.3.1 Introduction
The Lite Timer can be used for general-purpose
timing functions. It is based on two free-running 8-
bit upcounters and an 8-bit input capture register.
11.3.2 Main Features
■ Realtime Clock (RTC)
– One 8-bit upcounter 1 ms or 2 ms timebase
period (@ 8 MHz fOSC)
– One 8-bit upcounter with autoreload and pro-
grammable timebase period from 4µs to
1.024ms in 4µs increments (@ 8 MHz fOSC)
– 2 Maskable timebase interrupts
■ Input Capture
– 8-bit input capture register (LTICR)
– Maskable interrupt with wakeup from Halt
Mode capability
Figure 45. Lite Timer 2 Block Diagram
LTCSR1
8-bit TIMEBASE
/2
8-bit
fLTIMER
8
LTIC
fOSC/32
TB1F
TB1IE
TB
ICF
ICIE
LTTB1 INTERRUPT REQUEST
LTIC INTERRUPT REQUEST
LTICR
INPUT CAPTURE
REGISTER
1
0
1 or 2 ms
Timebase
(@ 8MHz
fOSC)
To 12-bit AT TImer
fLTIMER
LTCSR2
TB2F
0
TB2IE
0
LTTB2
8-bit TIMEBASE
0
0
8-bit AUTORELOAD
REGISTER
8
LTCNTR
LTARR
COUNTER 2
COUNTER 1
0
0
Interrupt request
1


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