参数资料
型号: MC68HC05PD6
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, TQFP-80
文件页数: 137/165页
文件大小: 841K
代理商: MC68HC05PD6
July 7, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05PD6
TIMER SYSTEM
MOTOROLA
REV 1.1
9-1
SECTION 9
TIMER SYSTEM
The MC68HC05PD6 has two timer modules, Timer 1 with a 16 bit counter and Timer 2
with an 8 bit counter. Timer 1 has TCAP input pin and TCMP output pin. Timer 2 has EVI
input pin and EVO output pin. The following block diagram describes the Timer System of
MC68HC05PD6.
Figure 9-1. Timer System Block Diagram
9.1
TIMER1
The timer consists of a 16-bit free-running counter driven by a xed divide-by-four
prescaler. This timer can be used for many purposes, including input waveform
measurements while simultaneously generating an output waveform. Pulse widths
can vary from several microseconds to many seconds. Refer to Figure 9-2 for
Timer 1 block diagram.
TCAP
INPUT
CONTROL1
TIMER1
TIMER2
EVI
INPUT
CONTROL2
PRESCALER
TIMER REGISTERS
OUTPUT
CONTROL
EVO
S
E
L
CAP
CLK1
EXCLK
CLK2
IEDG
T2CLK
OVF1
CMP1
CMP2
PH2
(16 bit counter)
(8 bit counter)
OUTPUT
CONTROL
TCMP
OE1
OL2
OE2
IL2
IM2
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