2 timer behavior during stop, 7 dma trigger, Timer behavior during stop -21 – Freescale Semiconductor DSP56366 User Manual

Page 251: Dma trigger -21

Advertising
background image

Timer Modes of Operation

DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4

Freescale Semiconductor

11-21

11.4.6.2

Timer Behavior during Stop

During the execution of the STOP instruction, the timer clocks are disabled, timer activity is stopped, and
the TIO0 signal is disconnected. Any external changes that happen to the TIO0 signal is ignored when the
DSP56366 is the stop state. To ensure correct operation, the timers should be disabled before the
DSP56366 is placed into the stop state.

11.4.7

DMA Trigger

Each timer can also be used to trigger DMA transfers. For this to occur, a DMA channel must be
programmed to be triggered by a timer event. The timer issues a DMA trigger on every event in all modes
of operation. The DMA channel does not have the capability to save multiple DMA triggers generated by
the timer. To ensure that all DMA triggers are serviced, the user must provide for the preceding DMA
trigger to be serviced before the next trigger is received by the DMA channel.

Advertising