參數(shù)資料
型號(hào): ST7PLITE05Y0B3
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP16
封裝: 0.300 INCH, PLASTIC, DIP-16
文件頁數(shù): 55/115頁
文件大?。?/td> 781K
代理商: ST7PLITE05Y0B3
ST7FLITE0
44/115
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 13-
bit upcounter with two software-selectable time-
base periods, an 8-bit input capture register and
watchdog function.
11.1.2 Main Features
s
Realtime Clock
– 8-bit upcounter
– 1 ms or 2 ms timebase period (@ 8 MHz fOSC)
– Maskable timebase interrupt
s
Input Capture
– 8-bit input capture register (LTICR)
– Maskable interrupt with wakeup from Halt
Mode capability
s
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 29. Lite Timer Block Diagram
LTCSR
WATCHDOG
8-bit UPCOUNTER
/2
8-bit
fLTIMER
fWDG
8
LTIC
fOSC/32
WDGD
WDGE
WDG
TBF
TBIE
TB
ICF
ICIE
WATCHDOG RESET
LTTB INTERRUPT REQUEST
LTIC INTERRUPT REQUEST
LTICR
INPUT CAPTURE
REGISTER
1
0
1or 2 ms
Timebase
(@ 8MHz
fOSC)
To 12-bit AT TImer
fLTIMER
RF
0
7
1
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