Motorola M68EZ328ADS user manual Executing Program Command Sequence

Freescale Semiconductor, Inc.

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

Freescale Semiconductor, Inc.

Programming On-board Flash Memory

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.

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

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-2shows 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

C-34M68EZ328ADS v2.0 USER’S MANUALMOTOROLA

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