TPU3 ROM Functions
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
D-5
D.3
Queued Output Match TPU3 Function (QOM)
QOM can generate single- or multiple-output match events from a table of offsets in parameter RAM.
Loop modes allow complex pulse trains to be generated once, a specified number of times, or continuously.
QOM can be used with other TPU3 channels in a variety of ways: the function can be triggered by a link
from the channel, the reference time for the sequence of matches can be obtained from it, or the channel
can be used as a discrete output pin. QOM can generate pulse-width modulated waveforms, including
waveforms with high times of 0 or 100%. See Freescale TPU3 Progamming Note
Queued Output Match
TPU Function (QOM), (TPUPN01/D).
shows all of the host interface areas for the QOM function. The bit encodings shown in
describe the corresponding fields in parameter RAM.
See
for the
PRAM Address Offset Map.
Table D-2. QOM Bit Encoding
A
Timebase Selection
0
Use TCR1 as Timebase
1
Use TCR2 as Timebase
Edge Selection
0
Falling Edge at Match
1
Rising Edge at Match
B:C
Reference for First Match
00
Immediate TCR Value
01
Last Event Time
10
Value Pointed to by REF_ADDR
11
Last Event Time
CONTROL BITS
Figure D-2. PTA Parameters
Summary of Contents for MPC561
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