mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 331

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13
Timer Module
This chapter describes the configuration and operation of the two general-purpose timer
modules (timer 0 and timer 1). It includes programming examples.
13.1 Overview
The timer module incorporates two independent, general-purpose 16-bit timers, timer 0 and
timer 1. The output of an 8-bit prescaler clocks each timer. There are two sets of registers,
one for each timer. The timers can operate from CLKIN or from an external clocking source
using one of the TIN signals. If CLKIN is selected, it can be divided by 16 or 1.
Figure 13-1 is a block diagram of one of the two identical ti5mer modules.
(÷1 or ÷16)
TOUT
IRQn
TIN
CLKIN
15
(latches TCN value when triggered by TIN)
Detection
Capture
Timer Capture Register (TCRn)
Generator
Figure 13-1. Timer Block Diagram
Timer
Clock
15
Chapter 13. Timer Module
(indicates capture or when TCN = TRRn)
GENERAL-PURPOSE TIMER
clock
(contains incrementing value)
Timer Event Register (TERn)
Timer Counter (TCNn)
Prescaler
Divider
Timer Mode Register (TMRn)
0
15
(reference value for comparison with TCN)
Timer Reference Register (TRRn)
Mode Bits
0
13-1
0