Motorola M68EZ328ADS - Manual (Page 35)

Programming On-board Flash Memory
C-34 M68EZ328ADS v2.0 USER’S MANUAL MOTOROLA
For example, when using SDS’s DOWN.EXE to generate the s-record, the "-w offset"
parameter can be used to specify this offset value. Please refer to the SingleStep User
Guide for using this command.
C.5 EXECUTING PROGRAM COMMAND SEQUENCE
Listed below is the source code of the flash Program which contains the necessary steps to
write the flash memory MBM29LV160T. It executes the flash program command sequence
and copies the ROM image from RAM area to the Flash memory area on ADS board. Figure
C-2 shows the flow chart of this program. Different brands of Flash memory may have dif-
ferent program command sequences, please refer to their datasheets for more details.
XREF STKTOP
OFFSET1 equ $AAA
OFFSET2 equ $554
TIME equ $FFF
*****************************************************************
ECHO MACRO CHAR
bsr TXD_RDY
nop
nop
nop
move.b #CHAR,$FFFFF907
ENDM
*****************************************************************
ENABLE MACRO
move.w #$00AA,(A5) ; Unlock Flash
move.w #$0055,(A6)
move.w #$00A0,(A5)
ENDM
*****************************************************************
SECTION parameter
pSOURCE DC.L $00010000
pTARGET DC.L $01000000
pSIZE DC.L $00010000
pFLASH DC.L $01000000
pERROR DC.L $0
pFINISH DC.L $0
pERROR_ADDRESS DC.L $0
DC.L STKTOP
*****************************************************************
SECTION code
START
MOVEA.L #STKTOP,a7 ;re-istall stack pointer in case bootstrap mode
MOVE.L #0,pERROR
MOVE.L #0,pFINISH
move.l #0,pERROR_ADDRESS
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ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005
ARCHIVED BY FREESCALE SEMICONDUCT
OR,
INC.
2005