參數(shù)資料
型號: MC68HC05G3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 115/128頁
文件大小: 290K
代理商: MC68HC05G3
Page 77
Section 8: TIMER SYSTEM
MOTOROLA
MC68HC05G3 (705G4) Specification Rev. 1.1
SECTION 8
TIMER SYSTEM
The MC68HC05G3 (705G4) has two timer modules, two timer input pins (TCAP and EVI),
and two timer output pins (TCMP and EVO). The following block diagram shows the timer
system of the MC68HC05G3 (705G4).
Figure 8-1: Timer Block Diagram
8.1
TIMER 1
Timer 1 is a 16-bit, free-running up counter which has one 16-bit input capture and one 16-
bit output compare. The timer is driven by a fixed system clock divided by four.
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. Refer to Figure 8-2: Timer 1 Block Diagram. Because
the timer has a 16-bit architecture, each specific functional segment (capability) is
TCAP
INPUT
CONTROL1
TIMER1
TIMER2
EVI
INPUT
CONTROL2
PRESCALER 1
TIMER REGISTERS
OUTPUT
CONTROL2
EVO
S
E
L
CAP
CLK1
EXCLK
CLK2
IEDG
I
M
2
I
L
2
T2CLK
O
L
2
O
E
2
CMP2
PHI2
TCMP
OUTPUT
CONTROL1
DDRG3
CMP1
CLK3
PWM
S
E
L
PWM2
PWM1
PWM0
PWM3
C
H
0
C
H
1
C
H
2
C
H
3
OUTPUT
CONTROL3
T3R1 T3R0
OLVL
PRESCALER 2
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