XC2000 datasheet(49/647 Pages) INFINEON

49 / 647 page

XC2000 Derivatives

System Units (Vol. 1 of 2)

Architectural Overview

Preliminary

User’s Manual

2-21

V1.0, 2007-06

ArchitectureX2K, V1.0

derived from the CPU clock via a programmable prescaler or with external signals. The

count direction (up/down) for each timer is programmable by software or may

additionally be altered dynamically by an external signal on a port pin (TxEUD).

Concatenation of the timers is supported via the output toggle latch (T6OTL) of timer T6,

which changes its state on each timer overflow/underflow.

The state of this latch may be used to clock timer T5, and/or it may be output on pin

T6OUT. The overflows/underflows of timer T6 can additionally be used to clock the

CAPCOM1/2 timers, and to cause a reload from the CAPREL register.

The CAPREL register may capture the contents of timer T5 based on an external signal

transition on the corresponding port pin (CAPIN), and timer T5 may optionally be cleared

after the capture procedure. This allows the XC2000 to measure absolute time

differences or to perform pulse multiplication without software overhead.

The capture trigger (timer T5 to CAPREL) may also be generated upon transitions of

GPT1 timer T3’s inputs T3IN and/or T3EUD. This is especially advantageous when T3

operates in Incremental Interface Mode.

XC2000 Datasheet(PDF) 49 Page - Infineon Technologies AG