MC68HC705E5 Datasheet, PDF (110/148 Pages) Freescale Semiconductor, Inc – General Release Specification

User EPROM
Freescale Semiconductor, Inc.
BOOT
DDRC <-%00001111
PORTC <-%00001111
DDRB <-%00100000
PORTB <-%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 <- $B00
GET BYTE FROM PORT A
JSR RAMSUB
NO _COMPARE
YES
JSR NXTADR
NO
END ADDRESS
($1FFF)
YES
VERF LED ON
WAIT
Figure 13-2. MC68HC705E5 Bootloader Flowchart
General Release Specification
User EPROM
For More Information On This Product,
Go to: www.freescale.com
MC68HC705E5 — Rev. 1.0