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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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68HC705SP7 датащи(PDF) 173 Page - Freescale Semiconductor, Inc |
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68HC705SP7 датащи(HTML) 173 Page - Freescale Semiconductor, Inc |
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173 / 230 page  Personality EPROM PEPROM Registers MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0 General Release Specification Personality EPROM 12.3 PEPROM Registers Two I/O registers control programming and reading of the PEPROM: • The PEPROM bit select register (PEBSR) • The PEPROM status and control register (PESCR) 12.3.1 PEPROM Bit Select Register (PEBSR) The PEPROM bit select register (PEBSR) selects one of 64 bits in the PEPROM array. Reset clears all the bits in the PEPROM bit select register. PEB7 and PEB6 — Not connected to the PEPROM array These read/write bits are available as storage locations. Reset clears PEB7 and PEB6. PEB5–PEB0 — PEPROM Bit Select Bits These read/write bits select one of 64 bits in the PEPROM as shown in Table 12-1. Bits PEB2–0 select the PEPROM row, and bits PEB5–PEB3 select the PEPROM column. Reset clears PEB5–PEB0, selecting the PEPROM bit in row zero, column zero. $000E Bit 7 654321 Bit 0 Read: PEB7 PEB6 PEB5 PEB4 PEB3 PEB2 PEB1 PEB0 Write: Reset: 00000000 Figure 12-2. PEPROM Bit Select Register (PEBSR) Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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