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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 1276 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 1276 Page - Freescale Semiconductor, Inc |
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1276 / 1350 page  Appendix A Electrical Characteristics MC9S12XDP512 Data Sheet, Rev. 2.17 1276 Freescale Semiconductor In Table A-26 the timing characteristics for master mode are listed. Figure A-8. Derating of maximum fSCK to fbus ratio in Master Mode In Master Mode the allowed maximum fSCK to fbus ratio (= minimum Baud Rate Divisor, pls. see SPI Section) derates with increasing fbus. A.7.2 Slave Mode In Figure A-9 the timing diagram for slave mode with transmission format CPHA = 0 is depicted. Table A-26. SPI Master Mode Timing Characteristics Num C Characteristic Symbol Min Typ Max Unit 1 D SCK frequency fsck 1/2048 — 1 /2fbus 1 D SCK period tsck 2 — 2048 tbus 2 D Enable lead time tlead — 1/2 — tsck 3 D Enable lag time tlag — 1/2 — tsck 4 D Clock (SCK) high or low time twsck — 1/2 — tsck 5 D Data setup time (inputs) tsu 8— — ns 6 D Data hold time (inputs) thi 8— — ns 9 D Data valid after SCK edge tvsck — — 15 ns 10 D Data valid after SS fall (CPHA = 0) tvss — — 15 ns 11 D Data hold time (outputs) tho 0— — ns 12 D Rise and fall time inputs trfi —— 8 ns 13 D Rise and fall time outputs trfo —— 8 ns 1/2 1/4 fSCK/fbus fbus [MHz] 10 20 30 40 15 25 35 5 |
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