Motorola DSP56367 User Manual page 381

; 3) 3n bytes (while n is the program length defined by the 3 first bytes)
; The program words will be stored in contiguous PRAM memory locations starting
; at the specified starting address.
; After reading the program words, program execution starts from the same
; address where loading started.
; The host MCU may terminate the loading process by setting the HF1=0 and HF0=1.
; When the downloading is terminated, the program will start execution of the
; loaded program from the specified starting address.
; The HDI08 boot ROM program enables the following busses to download programs
; through the HDI08 port:
;
; C - ISA
;
; D - HC11
;
; E - i8051
;
; F - MC68302
;
;========================================================================
MC68302HOSTLD
movep #%0000000000111000,x:M_HPCR
bra <HDI08CONT
OMR1IS0
jset #MA,omr,HC11HOSTLD ; If MD:MC:MB:MA=1101, go load from HC11 Host
MOTOROLA
- Dual strobes non-multiplexed bus with negative strobe
pulses dual positive request
- Single strobe non-multiplexed bus with positive strobe
pulse single negative request.
- Dual strobes multiplexed bus with negative strobe pulses
dual negative request.
- Single strobe non-multiplexed bus with negative strobe
pulse single negative request.
; Configure the following conditions:
; HAP = 0 Negative host acknowledge
; HRP = 0 Negative host request
; HCSP = 0 Negatice chip select input
; HDDS = 0 Single strobe bus (R/W~ and DS)
; HMUX = 0 Non multiplexed bus
; HASP = 0 (address strobe polarity has no
;
; HDSP = 0 Negative data stobes polarity
; HROD = 0 Host request is active when enabled
; spare = 0 This bit should be set to 0 for
;
; HEN = 0 When the HPCR register is modified
;
; HAEN = 1 Host acknowledge is enabled
; HREN = 1 Host requests are enabled
; HCSEN = 1 Host chip select input enabled
; HA9EN = 0 (address 9 enable bit has no
;
; HA8EN = 0 (address 8 enable bit has no
;
; HGEN = 0 Host GPIO pins are disabled
DSP56367
Bootstrap ROM Contents
meaning in non-multiplexed bus)
future compatability
HEN should be cleared
meaning in non-multiplexed bus)
meaning in non-multiplexed bus)
A-7