C167CS-L datasheet(27/81 Pages) INFINEON

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C167CS-4R

C167CS-L

Data Sheet

V2.2, 2001-08

Capture/Compare (CAPCOM) Units

The CAPCOM units support generation and control of timing sequences on up to

32 channels with a maximum resolution of 16 TCL. The CAPCOM units are typically

used to handle high speed I/O tasks such as pulse and waveform generation, pulse

width modulation (PMW), Digital to Analog (D/A) conversion, software timing, or time

recording relative to external events.

Four 16-bit timers (T0/T1, T7/T8) with reload registers provide two independent time

bases for the capture/compare register array.

The input clock for the timers is programmable to several prescaled values of the internal

system clock, or may be derived from an overflow/underflow of timer T6 in module GPT2.

This provides a wide range of variation for the timer period and resolution and allows

precise adjustments to the application specific requirements. In addition, external count

inputs for CAPCOM timers T0 and T7 allow event scheduling for the capture/compare

registers relative to external events.

Both of the two capture/compare register arrays contain 16 dual purpose capture/

compare registers, each of which may be individually allocated to either CAPCOM timer

T0 or T1 (T7 or T8, respectively), and programmed for capture or compare function.

Each register has one port pin associated with it which serves as an input pin for

triggering the capture function, or as an output pin to indicate the occurrence of a

compare event.

When a capture/compare register has been selected for capture mode, the current

contents of the allocated timer will be latched (‘capture’d) into the capture/compare

generated. Either a positive, a negative, or both a positive and a negative external signal

transition at the pin can be selected as the triggering event. The contents of all registers

which have been selected for one of the five compare modes are continuously compared

with the contents of the allocated timers. When a match occurs between the timer value

and the value in a capture/compare register, specific actions will be taken based on the

selected compare mode.

C167CS-L Datasheet(PDF) 27 Page - Infineon Technologies AG