參數(shù)資料
型號: MC68HC05L16CFU
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, QFP-80
文件頁數(shù): 122/146頁
文件大小: 852K
代理商: MC68HC05L16CFU
MC68HC05L16 MC68HC705L16 Data Sheet, Rev. 4.1
Freescale Semiconductor
77
Chapter 9
Timer System
9.1 Introduction
The MC68HC05L16 has two timer modules: timer 1 with a 16-bit counter and timer 2 with an 8-bit counter.
Timer 1 has one input pin (TCAP) and no output pin. Timer 2 has one input pin (EVI) and one output pin
(EVO). Figure 9-1 illustrates the timer system of MC68HC05L16.
Figure 9-1. Timer System Block Diagram
9.2 Timer 1
Timer 1 consists of a 16-bit software-programmable counter driven by a fixed divide-by-four prescaler.
This timer can be used for many purposes, including input waveform measurements while simultaneously
generating an output compare interrupt. Pulse widths can vary from several microseconds to many
seconds. See Figure 9-2.
TCAP
INPUT
CONTROL 1
TIMER1
TIMER2
EVI
INPUT
CONTROL 2
PRESCALER
TIMER REGISTERS
OUTPUT
CONTROL
EVO
SEL
CAP
CLK1
EXCLK
CLK2
IEDG
IM2
IL2
T2CLK
O
L
2
O
E
2
OVF1
CMP1
CMP2
PH2
16-BIT COUNTER
8-BIT COUNTER
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