Atmel AVR XMEGA AU series User Manual

198
8331B–AVR–03/12
Atmel AVR XMEGA AU
15.8 DMA Support
Timer/counter underflow and compare interrupt flags can trigger a DMA transaction. The
acknowledge condition that clears the flag/request is listed in Table 15-1 on page 198.
15.9 Timer/Counter Commands
A set of commands can be given to the timer/counter by software to immediately change the
state of the module. These commands give direct control of the update, restart, and reset
signals.
The software can force a restart of the current waveform period by issuing a restart command. In
this case the counter, direction, and all compare outputs are set to zero.
A reset command will set all timer/counter registers to their initial values. A reset can only be
given when the timer/counter is not running (OFF).
Table 15-1. DMA request sources.
Request Acknowledge Comment
LUNFIF DMAC writes to LCNT
DMAC writes to LPER
HUNFIF DMAC writes to HCNT
DMAC writes to HPER
CCIF{D,C,B,A} DMAC access of
LCMP{D,C,B,A}
Output compare operation

Atmel AVR XMEGA AU series Specifications

General

Brand	Atmel
Model	AVR XMEGA AU series
Category	Microcontrollers
Language	English