ST7LITES2 查看數據表（PDF） - STMicroelectronics

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ST7LITES2

8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

STMicroelectronics 

ST7LITE0x, ST7LITESx

11 ON-CHIP PERIPHERALS

11.1 LITE TIMER (LT)

11.1.1 Introduction

The Lite Timer can be used for general-purpose

timing functions. It is based on a free-running 8-bit

upcounter with two software-selectable timebase

periods, an 8-bit input capture register and watch-

dog function.

11.1.2 Main Features

■ Realtime Clock

– 8-bit upcounter

– 1 ms or 2 ms timebase period (@ 8 MHz fOSC)

– Maskable timebase interrupt

■ Input Capture

– 8-bit input capture register (LTICR)

– Maskable interrupt with wakeup from Halt

Mode capability

Figure 30. Lite Timer Block Diagram

■ Watchdog

– Enabled by hardware or software (configura-

ble by option byte)

– Optional reset on HALT instruction (configura-

ble by option byte)

– Automatically resets the device unless disable

bit is refreshed

– Software reset (Forced Watchdog reset)

– Watchdog reset status flag

fLTIMER

To 12-bit AT TImer

fOSC/32

8-bit UPCOUNTER

fWDG

/2

fLTIMER

1

Timebase

0

1 or 2 ms

(@ 8 MHz

fOSC)

WATCHDOG

WATCHDOG RESET

LTICR

8

LTIC

8-bit

INPUT CAPTURE

REGISTER

LTCSR

ICIE ICF

7

TB TBIE

TBF

WDG

RF

WDGE WDGD

0

LTTB INTERRUPT REQUEST

LTIC INTERRUPT REQUEST

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