mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 526

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Communication Processor Module
16.4 TIMERS
The communication processor module includes four identical 16-bit general-purpose timers
that can be cascaded into two 32-bit timers. Each general-purpose timer consists of a timer
mode register, a timer capture register, a timer counter, a timer reference register, a timer
event register, and a timer global configuration register. The timer mode register contains
the prescaler value that you program. The timer block diagram is illustrated in Figure 16-34.
16.4.1 Features
The following list summarizes the main features of the timers:
• Maximum period of 10.7 seconds (at 25MHz)
• Minimum 40ns resolution (at 25MHz)
• Programmable sources for the clock input
• Input capture capability
• Output compare with programmable mode for the output pin
• Four timers can be internally or externally cascaded to form two 32-bit timers. However,
• Timer 1 exclusive-Or’ed with SPKR input from PCMCIA to generate SPKROUT
• Free run and restart modes
if you are using Mask Revision Base #F98S, there are only two timers.
TER1
TMR1
TCN1
TRR1
TCR1
TGCR
TIMER1
TIMER2
GLOBAL CONFIGURATION REGISTER
TIMER3
TIMER4
PRESCALER
DIVIDER
REFERENCE REGISTER
CAPTURE REGISTER
MODE REGISTER
TIMER COUNTER
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 16-34. Timer Block Diagram
EVENT REGISTER
MODE BITS
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
CLOCK
GENERAL SYSTEM CLOCK
GENERATOR
DETECTION
CAPTURE
CLOCK
TIMER
TGATE1
TIN1
TIN2
TOUT1
TOUT2
TIN3
TIN4
MOTOROLA