Easy question re: TPU parameter RAM

"Paul Helmuth" <[email protected]>
Newsgroups gmane.comp.hardware.motorola.microcontrollers
Message-ID <[email protected]>
All,

I am trying to work with the PMM/PMA function(s) and have a simple 
question regarding the location of the ERROR/TCR2_VALUE parameter word.

Referencing the Programming Note (TPUPN15B/D - for PMM), figure 3 (on 
page 5) shows some space between the PERIOD_LOW_WORD and the next 
parameter word (ERROR/TRC2_VALUE). In the left margin there is also 
some "strangeness" with the symbolic addresses.

The first group of parameters are shown to be at a "sequential" (and 
apparently contiguious) series of symbolic addresses. As follows...

$YFFFW0   REF_TIME | CHANNEL_CONTROL
$YFFFW2   MAX_MISSING | NUM_OF_TEETH
$YFFFW4   BANK_SIGNAL | ROLLOVER_COUNT
$YFFFW6   RATIO | TCR2_MAX_VALUE
$YFFFW8   PERIOD_HIGH_WORD
$YFFFWA   PERIOD_LOW_WORD

$YFFFFC   ERROR | TCR2_VALUE

Note the switch from $YFFFWx to $YFFFFC.

Is this a typo? Should that address for ERROR/TCR2_VALUE read $YFFFWC 
(this is where I would expect it to be)?

The reason that I ask, is that I am running the function and don't see 
TCR2_VALUE changing (or ERROR for that matter).

Sorry for the lengthy explanation, but I wanted to be clear about the 
point of confusion.

Thanks very kindly in advance to anyone that can confirm the location 
of ERROR/TCR2_VALUE.

-Paul





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