PM4541 datasheet(33/46 Pages) PMC

33 / 46 page

TELECOM STANDARD PRODUCT

PMC-Sierra, Inc.

PM4541 T1XC-EVBD

PMC-920314

ISSUE 2

T1XC EVALUATION DAUGHTERBOARD

UNTIL

SCDR C@ DROP ; ( remove key pressed )

( from uP input reg

)

( Define word to write XPLS D/A code value )

: XWR

( DATA ADDR --- )

XPLS 2+ C!

( SELECT CODE REG )

XPLS 3 + C! ; ( WRITE CODE VALUE)

( Define word to READ XPLS D/A code value )

: XRD

( ADDR --- )

XPLS 2+ C!

( SELECT CODE REG )

XPLS 3 + C@

( READ CODE VALUE)

U. ."

" ;

( Write complete template values to XPLS

)

( Usage: Value1 Value2 ... Value8 WRTEMPL )

: WRTEMPL

( C1 C2 C3 C4 C5 C6 C7 C8 --- )

8 0 DO 7 I - XWR LOOP ;

( Read all template values from XPLS

)

( Usage: RDTEMPL

)

( uP response: Value1 Value2 ... Value8

)

( [in HEX]

)

: RDTEMPL

( --- )

8 0 DO I XRD LOOP ;

To use these functions, use the following syntax (the interpreter response is shown

in italics):

FRMR STATUS RD

= FF HEX

( Read T1XC #1 FRMR reg #2 contents

)

XBAS 10 WR

( Write 10 hex to T1XC #1 XBAS reg

0 )

This document is not intended to give a full tutorial in FORTH, which is better

covered in the many FORTH books available. The FORTH kernel on the 68HC11

on the EVMB is based upon the FORTH-83 standard and should be upward

compatible from FORTH-79. For a complete, detailed FORTH tutorial, refer to the

manuals listed in the references.

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