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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HC705CT4GRS/D 데이터시트(PDF) 110 Page - NXP Semiconductors |
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HC705CT4GRS/D 데이터시트(HTML) 110 Page - NXP Semiconductors |
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110 / 152 page  EPROM General Release Specification MC68HC705CT4 — Rev. 2.0 110 EPROM MOTOROLA Figure 15-2. MC68HC705CT4 Bootloader Flowchart BOOT PB2 = 0 JUMP TO RAM PUT RAMSUB IN RAM DDRC ← %00001111 PORTC ← %00001111 GET BYTE FROM PORT A PROGRAM BYTE JSR NXTADR GATE STRESS DRAIN STRESS DDRA = OUTPUT GET BYTE START @ $B00 PUT BYTE ON PORT A CHANGE INSTRUCTION FROM STA TO EOR INC COUNT TO $B00 START ADDR ← $B00 GET BYTE FROM PORT A JSR RAMSUB JSR NXTADR END ADDRESS ($1FFF) END ADDRESS ($1FFF) WAIT WAIT PB0=1 (SYNC) WAIT VERF LED ON COMPARE END ADDR ($1FFF) PB4 = 1 PB3 = 1 PB4 = 1 PB0 = 1 YES YES NO YES NO YES YES YES YES YES YES NO NO NO NO NO NO NO NO YES DUMP EPROM PRG/VERF VERIFY MAYPRG BUMP COUNT TO $B00 BUMP COUNT TO $B00 DDRB ← %00100000 PORTB ← %00000000 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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