ST7LITE1XB datasheet(79/157 Pages) STMICROELECTRONICS

部件名	ST7LITE1XB

功能描述	8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI

PDF	157 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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79 / 157 page

ST7LITE1xB

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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

– 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 wake-up from Halt

mode capability

Figure 51. Lite Timer 2 Block Diagram

LTCSR1

8-bit TIMEBASE

8-bit

fLTIMER

LTIC

fOSC/32

TB1F

TB1IE

ICF

ICIE

LTTB1 INTERRUPT REQUEST

LTIC INTERRUPT REQUEST

LTICR

INPUT CAPTURE

1 or 2 ms

Timebase

(@ 8 MHz

fOSC)

To 12-bit AT TImer

fLTIMER

LTCSR2

TB2F

TB2IE

LTTB2

8-bit TIMEBASE

8-bit AUTORELOAD

LTCNTR

LTARR

COUNTER 2

COUNTER 1

Interrupt request

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