MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 77

• Manufacturer Part Number: MCMC68HC05L16
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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).
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
Freescale Semiconductor
Figure 9-1
PH2
TCAP
EVI
Figure
PRESCALER
illustrates the timer system of MC68HC05L16.
CONTROL 1
CONTROL 2
IM2
9-2.
INPUT
INPUT
IEDG
IL2
Figure 9-1. Timer System Block Diagram
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
CAP
CLK1
EXCLK
CLK2
T2CLK
SEL
TIMER REGISTERS
16-BIT COUNTER
8-BIT COUNTER
TIMER1
TIMER2
CMP2
OVF1
CMP1
O
L
2
CONTROL
OUTPUT
O
E
2
EVO
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