peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 126

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
.EQU MBUSY
.EQU MDT0
.EQU MDT0_ADD
.EQU MDT1_ADD
.EQU MB_NOP
.EQU FINISH_BOOT
.EQU START_BOOT
.EQU WRITE_PROG
.EQU START_LOAD
.EQU MCMD_ERROR
.EQU PROG_ERROR
.EQU PASSR_REG
.CODE S_Main
.USE S_Main
.ORG 0xff00
bootrtn:
;##########################################################
; Initialization
; The mail box on the CDI is a slow memory, therefore, wait
; states are needed. If the DOC will run in a frequency higher
; then 40 Mhz 7 WS will be needed. Therefore, the default of
; 7 WS in DWS field of MEMCONF is not changed.
;##########################################################
; This check decides what kind if boot is it.
; If it's a ROM boot. EPM bit is active. EPM is the MSB
; of the BOOTCONF, therefore, after reading it to the
; accumulator, the sign extension will create a negative
; value if EPM is set (M flag will be activated)
lpg
mov
mov
mov
set
mov
br
#IOPAGE
#0x0,r5
##0x200,sp
##PASSR_REG,r1
##0xf236,(r1)
BOOTCONF,a0
rom_boot,lt
0x41
0x42
0xc042
0xc044
0x0
0x7
0x55
0x28
0x7
0x70
0x71
0xc006
; r5=0
; Put a default value in SP
; PASSR register address
; disable program protection
; Read the EPM bit.
; micro-processor mail box busy bit
; micro-processor mail box data reg 0
; micro-processor mail box data reg 0
; micro-processor mail box data reg 1
; mail-box NOP
; mail-box Finish boot command
; mail-box Start boot procedure
command
; mail-box write program
; mail-box start prog. load command
; Error in micro-processor command
; Program data verification failed
; PASSR register address
2-80
Functional Block Description
PEB 20560
2003-08