Chip Errata

DSP56366 Digital Signal Processor

Mask:2J26D

DSP56366 Errata

366CE2J26D_0_0

NG 11/12/01 pg. 21 of 25

 1997 -2001, Motorola

ED34

Description (added 1/5/99; identified as a Documentation errata 2/1/99):

When stack extansion is enabled, the read result from stack may be

improper if two previous executed instructions cause sequential read and

write operations with SSH. Two cases are possible:

Case 1:

For the first executed instruction: move from SSH or bit manipulation on

SSH (i.e. jclr, brclr, jset, brset, btst, bsset, jsset, bsclr, jsclr).

For the second executed instruction: move to SSH or bit manipulation on

SSH (i.e. jsr, bsr, jscc, bscc).

For the third executed instruction: an SSL or SSH read from the stack

result may be improper - move from SSH or SSL or bit manipulation on

SSH or SSL (i.e., bset, bclr, bchg, jclr, brclr, jset, brset, btst, bsset, jsset,

bsclr, jsclr).

Workaround:

Add two NOP instructions before the third executed instruction.

Case 2:

For the first executed instruction: bit manipulation on SSH (i.e. bset, bclr,

bchg).

For the second executed instruction: an SSL or SSH read from the stack

result may be improper - move from SSH or SSL or bit manipulation on

SSH or SSL (i.e., bset, bclr, bchg, jclr, brclr, jset, brset, btst, bsset, jsset,

bsclr, jsclr).

Workaround:

Add two NOP instructions before the second executed instruction.

Pertains to: DSP56300 Family Manual, Appendix B, add a new section

called “Stack Extension Enable Restrictions.” Cover all cases. Also, in

Section 6.3.11.15, add a cross reference to this new section.

2J26D

Errata Description

Applies

to Mask

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com