Reference Manual

PMAC 2 Software Reference
PMAC I/0 and Memory Map 411
The format of the conversion table is:
Y:word
Bits Conversion Format:
16-23
$00 = 1/T interpolation of incremental encoder
$10 = A/D register conversion
$20 = Unfiltered parallel Y word source*
$30 = Filtered parallel Y word source**
$40 = Time base*
$50 = Integrated A/D register conversion
$60 = Unfiltered parallel X word source*
$70 = Filtered parallel X word source**
$80 = Parallel interp. of incremental
$90 = Triggered time base; frozen*
$A0 = Triggered time base; running*
$B0 = Triggered time base; armed*
$C0 = no interpolation of incremental encoder
$D0 = Exponential filter**
$F0 = High-res. Interpolation of sinusoidal encoder
0-15 Address of source data
* Next Y word contains user-set constant for conversion (this is a double-entry conversion).
** Next two Y words contain user-set constants for conversion (this is a triple-entry
conversion).
X:word
0-4 Fractional bits of converted data
5-23 Integer bits of converted data (if last entry in
conversion)
Intermediate value if not last entry in conversion
Refer to the detailed description of the encoder conversion table under “Feedback
Features”.