DSP56311CE1K34A Motorola Inc, DSP56311CE1K34A Datasheet - Page 6

Manufacturer Part Number

DSP56311CE1K34A

Description

DSP56311 Device Errata for Mask

Manufacturer

Motorola Inc

Datasheet

1.DSP56311CE1K34A.pdf (14 pages)

Documentation Errata

ED33

Description (added 12/16/98; identified as a Documentation errata 2/1/99):

When Stack Extension mode is enabled, a use of the instructions BRKcc or

ENDDO inside do loops might cause an improper operation.

If the loop is non nested and has no nested loop inside it, the errata is relevant only if

LA or LC values are being used outside the loop.

Workaround:

If Stack Extension is used, emulate the BRKcc or ENDDO as in the following

examples. We split between two cases, finite loops and do forever loops.

1) Finite DO loops (i.e. not DO FOREVER loops)

==============================================

BRKcc

Original code:

label2

label1

Will be replaced by:

do #N,label1

.....

do #N, label1

.....

DSP56311 Device Errata for Mask 1K34A, Rev. 5

do #M,label2

.....

BRKcc

.....

do #M, label2

.....

Jcc

.....

fix_brk_routine

Freescale Semiconductor

1K34A