peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 127

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

; If the DBG flag in the OCEM is active, it is an emulation
; boot. The dbg flag is in STATUS1 register, bit 15 (MSB).
; Therefore, if it is set, a transfer to the accumulator will
; make the accumulator negative.
;##########################################################
; micro-processor boot
;
; After the read of the micro-processor mail-box, the MBUSY bit
; is set and then the micro-processor is loading the next data.
; In parallel to this load, the boot routine verifies that the
; data loaded to the program RAM is correct.
; The micro-processor should respond with ’Start boot procedure
; command’.
; The ’start boot procedure’ command is added always but it is
; realy needed in a special case. It is when the download
; verification fails. In this case, the boot has to restart
; but meanwile, the micro-processor has started writing the
; next data and may write the write command. Therefore, in
; this case the OAK waits until the micro-processor receives
; the error command and reacts with the ’start boot procedure’
; command.
int2_poll1:
Semiconductor Group
mov
mov
br
load
mov
mov
rep
nop
tst1
brr
mov
mov
##STATUS1,r0
(r0),a0
emu_boot,lt
#0x2,stepi
##START_LOAD,r0
r0,OCMD
#0x6
##0x2000,st2
int2_poll1,neq
MCMD,a0
r5,MBUSY
; STATUS1 address to r0
; Read the DBG bit.
; Stepi = 2
; Code of start load command
; command to OCMD register
; Wait until INT2 is reset after
; a clear of busy bit
; check if int2 is set
; Wait for int2
; Read micro-processor command
; Clear busy bit
2-81
Functional Block Description
PEB 20560
2003-08