General-Purpose Timers (Gtms); Gtm Overview - Freescale Semiconductor MPC8313E Family Reference Manual

Powerquicc ii pro integrated processor

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System Configuration

General-Purpose Timers (GTMs)

The following sections describe theory of operation of the general purpose (global) timer module,

including a definition of the external signals and the functionality. Additionally, the configuration, control,

and status registers are described. Note that individual chapters in this book describe additional specific

initialization aspects for each individual block.

Each global timer module (GTM) includes four identical 16-bit general-purpose timers, two 32-bit timers

or one 64-bit timer. Each GTM timer consists of a timer prescale register (GTPSR), a timer mode register

(GTMDR) a timer capture register (GTCPR), a timer counter register (GTCNR), a timer reference register

(GTRFR), a timer event register (GTEVR), and a timer global configuration register (GTCFR). The

GTPSRs and the GTMDRs contain the primary and secondary prescalers, programmed by the user.

shows the functional GTM block diagram.

Global Configuration Register 1

MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3

Event Register

Prescale Register

Mode Register

16-Bit Counter

Reference Register

Capture Register

Registers Interface

Figure 5-39. Global Timers Block Diagram

System Clock

Freescale Semiconductor

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