EB632 datasheet(100/112 Pages) FREESCALE

100 / 112 page

Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M), Rev. 2

100

Freescale Semiconductor

Bootloader Program

move.l r1,(r6+PODRB); PODRB[18,19]=1

move.l r1,(r6+PSORB); PSORB[18,19]=1

move.l r1,(r6+PPARB);

move.l #$00000000,r1

nop

;due to restriction 6.4.4.a.2

move.l r1,(r6+PDIRB);

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;Initiate I2C Registers

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

move.w #$0,r1

move.b r1,(r6+I2MOD);Clear i2mod

move.b r1,(r6+I2CMR);Disable All Interrupt

move.w #$ec,r1

move.b r1,(r6+I2ADD);Slave Address= 00 ( optional )

move.w #$0017,r1

move.b r1,(r6+I2CER)

;Clear all previous events

move.w #I2MODVAL,r1

move.b r1,(r6+I2MOD);I2MOD[GCD]=1,[FLT]=1

move.w

#I2BRGVAL,r1

move.b r1,(r6+I2BRG)

;I2BRG[DIV]=6

move.w #$0001,r1

move.b r1,(r6+I2COM)

;I2COM[M/s]=1 ( Master mode )

move.w #I2MODVALE,r1

move.b r1,(r6+I2MOD);Set I2MO[EN]

;*********************************

;SRAM base moved to r7 due to register usage

;********************************

move.l r5,(r5)

nop

move.l (r5),r7

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; Initiate debug area at IMMR + Debug Pointer

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

move.l #DEBUGPTR,d10

;

add

d9,d10,d10;d10 <- ptr to debug area

move.l

d10,r1;r1

<- ptr to debug area

add

#$4,d10

;d10 <- ptr to empty space in debug area

nop

move.l d10,(r1);save the the ptr in r1

move.l d10,r1

;move empty ptr to r1

; This lines will move a empty pattern ( a5 )

; to all the debug area

move.w

#$a5a5,d10;d10 receive empty pattern

iloop

move.b

d10,(r1)+;save empty pattern in r1 and increment r1

nop

;added due to restriction

move.l

r1,d8;Move r1 to d8

nop

;added due to restriction

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