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Chapter 17
Timers
170
170
The CPM includes four identical 16-bit general-purpose timers or two 32-bit timers. Each
general-purpose timer consists of a timer mode register (TMR), a timer capture register
(TCR), a timer counter (TCN), a timer reference register (TRR), a timer event register
(TER), and a timer global conÞguration register (TGCR). The TMRs contain the prescaler
values programmed by the user.
Figure 17-1 shows the timer block diagram.
TGCR
Global Configuration Register
TER1
Timer Event Register
TMR1
Prescaler
Divider
TCN1
Timer Counter (TCN)
TRR1
Reference Register
TCR1
Timer1
Timer2
Timer3
Timer4
Pin assignments for TINx, TGATEx, and TOUTx are described in Section 35.5, ÒPorts
Tables.Ó
MOTOROLA
Mode Register
Mode Bits
Clock
Capture Register
Figure 17-1. Timer Block Diagram
Chapter 17. Timers
General
System Clock
Timer
Clock
Generator
Capture
Detection
TGATE1
TGATE2
TIN1
TIN2
TIN3
TIN4
TOUT1
TOUT2
TOUT3
TOUT4
17-1
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