Motorola DSP56305 User Manual page 557

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; If MD:MC:MB:MA=1010, then it loads the program RAM from the SCI interface.
;
; The SCI bootstrap code expects first
; number of program
; start loading the program words
; to be loaded. The number of words, the starting address
; words are received least significant
; then by the most significant byte.
;
; The program words
; contiguous PRAM
; address. After
; from the same address where loading started.
;
; The SCI is programmed to work
; stop bit and no parity.
; frequency must be 16x the baud
; is echoed back through the SCI transmitter.
;
;
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; If MD:MC:MB:MA=1011,
; programmed to operate in the Universal Bus mode supporting 56301-to-56301
; glue less connection.
;
; The HI32 bootstrap code expects first
; the number of program
; address to start loading
; each program word to be loaded.
;
; The program words
; locations starting
; reading the program words,
; address where loading started.
;
; The Host Interface
; Host Flag 0 (HF0) in HCTR
; loaded program from the specified starting address.
;
; During the access, the HAEN and HA10-HA3
; HA2-HA0 select the HI32 registers.
; Before booting through
; Host boot program will verify
; the status register (HSTR) and confirm that its value is $3.
;
; Suggested 56301-to-56301 connection:
;
; slave master
; 56301/HI32 56301/PortA
;
; HA[10:3] <- A[10:3]
; HA[2:0] <- A[2:0]
MOTOROLA
words, afterwards
and then 3 bytes for each program word
will be condensed
memory locations starting at the
reading the program words, program
in asynchronous mode with 8 data bits,
The clock
rate. After
then it loads the program RAM from the Host Interface
words, afterwards
the program words
will be stored
at the specified
program execution
bootstrap load program may be stopped by setting the
register. This will start
the Host Interface it is recommended
that the HI32 is operational, by reading
; selects HI32 (base address 00000000)
; selects HTXR registers
DSP56305 User's Manual
to receive 3 bytes specifying
3 bytes specifying
byte first followed by the mid and
into 24-bit words and stored in
specified starting
execution starts
source is external and
each byte is received, it
to read a 24-bit
a 24-bit word
and then 24-bit
in contiguous
starting address.
starts
execution of the
pins must be driven low; pins
Bootstrap Code
the
the address to
and the program
1
the clock
word specifying
specifying the
word for
PRAM memory
After
from the same
that the
A-3