DSP56366 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56366

Digital Signal Processor

Motorola => Freescale 

ED34

Freescale Semiconductor, Inc.

Chip Errata

DSP56366 Digital Signal Processor

Mask:2J26D

Errata Description

Applies

to Mask

Description (added 1/5/99; identified as a Documentation errata 2/1/99): 2J26D

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.

DSP56366 Errata

 1997 -2001, Motorola

For Mor3e66ICnfEo2rJm26aDt_io0n_0On This Product,

Go to: www.freescale.com

NG 11/12/01 pg. 21 of 25

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