|
MC68HC705CT4 Datasheet, PDF (110/152 Pages) Freescale Semiconductor, Inc – General Release Specification | |||
|
◁ |
EPROM
Freescale Semiconductor, Inc.
BOOT
DDRC â %00001111
PORTC â %00001111
DDRB â %00100000
PORTB â %00000000
PUT RAMSUB IN RAM
YES
PB3 = 1
NO
PB4 = 1 YES
DUMP EPROM
NO
DDRA = OUTPUT
BUMP COUNT TO $B00
GET BYTE START @ $B00
PUT BYTE ON PORT A
YES
END ADDRESS
($1FFF)
NO
YES PB0=1
NO
(SYNC)
WAIT
YES
NO
PB2 = 0
JUMP TO RAM
MAYPRG
YES
PB4 = 1
PRG/VERF
NO
YES
PB0 = 1
NO
GATE STRESS
DRAIN STRESS
WAIT
BUMP COUNT TO $B00
GET BYTE FROM PORT A
PROGRAM BYTE
JSR NXTADR
END ADDR
NO
($1FFF)
YES
VERIFY
CHANGE INSTRUCTION
FROM STA TO EOR
INC COUNT TO $B00
START ADDR â $B00
GET BYTE FROM PORT A
JSR RAMSUB
NO COMPARE
YES
JSR NXTADR
END ADDRESS
NO
($1FFF)
YES
VERF LED ON
WAIT
Figure 15-2. MC68HC705CT4 Bootloader Flowchart
General Release Specification
MC68HC705CT4 â Rev. 2.0
110
EPROM
MOTOROLA
For More Information On This Product,
Go to: www.freescale.com
|
▷ |