参数资料
型号: ST7PLITEUS5U3TR
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, DSO8
封装: LEAD FREE, DFN-8
文件页数: 51/108页
文件大小: 1957K
代理商: ST7PLITEUS5U3TR
ST7LITEUSx
47/108
10 ON-CHIP PERIPHERALS
10.1 LITE TIMER (LT)
10.1.1 Introduction
The Lite Timer can be used for general-purpose
timing functions. It is based on a free-running 13-
bit upcounter with two software-selectable time-
base periods, an 8-bit input capture register and
watchdog function.
10.1.2 Main Features
Realtime Clock
– 13-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
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
Figure 30. Lite Timer Block Diagram
LTCSR
WATCHDOG
13-bit UPCOUNTER
/2
8-bit
fLTIMER
fWDG
8 MSB
LTIC
fOSC
WDGD
WDGE
WDG
TBF
TBIE
TB
ICF
ICIE
WATCHDOG RESET
LTTB INTERRUPT REQUEST
LTIC INTERRUPT REQUEST
LTICR
INPUT CAPTURE
REGISTER
1
0
1 or 2 ms
Timebase
(@ 8MHz
fOSC)
To 12-bit AT TImer
fLTIMER
RF
0
7
1
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