DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 230

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Bootstrap Program
_LOOP9
_LOOP11
_LOOP10
;========================================================================
FINISH
; This is the exit handler that returns execution to normal
; expanded mode and jumps to the RESET vector.
; End of bootstrap code. Number of program words: 91
;*****************************************************************************
;
;
;
;
;
;*****************************************************************************
ioequ
A.2 Equates for I/O Port Programming
;------------------------------------------------------------------------
;
M_HDR
M_HDDR
M_PCRC
M_PRRC
M_PDRC
A-8
page132,55,0,0,0
optmex
EQUATES for 56303 I/O registers and ports
Last update: June 11 1995
movem p:(r2)+,a2
asr #8,a,a
move a1,r0
move a1,r1
do a0,_LOOP10
do #3,_LOOP11
movem p:(r2)+,a2
asr #8,a,a
movem a1,p:(r0)+
andi #$0,ccr
jmp (r1)
ident
Register Addresses
EQU
EQU
EQU
EQU
EQU
1,0
$FFFFC9
$FFFFC8
$FFFFBF
$FFFFBE
$FFFFBD
; Get the 8 LSB from ext. P mem.
; Shift 8 bit data into A1
;
; starting address for load
; save it in r1
; a0 holds the number of words
; read program words
; Each instruction has 3 bytes
; Get the 8 LSB from ext. P mem.
; Shift 8 bit data into A1
; Go get another byte.
; Store 24-bit result in P mem.
; and go get another 24-bit word.
; Boot from EPROM done
; Clear CCR as if RESET to 0.
; Then go to starting Prog addr.
; Host port GPIO data Register
; Host port GPIO direction Register
; Port C Control Register
; Port C Direction Register
; Port C GPIO Data Register
DSP56303 User’s Manual, Rev. 2
Freescale Semiconductor