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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MC68HC705MC4MP 데이터시트(PDF) 57 Page - Freescale Semiconductor, Inc |
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MC68HC705MC4MP 데이터시트(HTML) 57 Page - Freescale Semiconductor, Inc |
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57 / 180 page  Operating Modes Bootloader Mode General Release Specification Operating Modes Figure 6-2. Bootloader Flowchart BOOT PC1 = 0 FACTORY TEST MODE GET BYTE FROM PORT A PROGRAM BYTE GET NEXT ADDRESS DDRA = OUTPUT GET BYTE START @ $100 PUT BYTE ON PORT A CHANGE INSTRUCTION FROM STA TO EOR INCREASE COUNT TO $100 START ADDR <- $100 GET BYTE FROM PORT A JSR RAMSUB GET NEXT ADDRESS END ADDRESS ($0FFF) END ADDRESS ($0FFF) WAIT FACTORY WAIT VERIFY LED ON COMPARE END ADDR ($0FFF) PC2 = 1 PC3 = 1 PC2 = 1 YES YES NO YES YES YES YES YES NO NO NO NO NO NO NO YES DUMP EPROM PRG/VERF VERIFY MAYPRG BUMP COUNT TO $100 BUMP COUNT TO $100 INITIALIZE I/O PORTS GET NEXT ADDRESS *Ignores boot code address space Mask set 0F21S does not verify MOR. TEST MODE Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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