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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) 174 Page - Freescale Semiconductor, Inc |
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68HC705SP7 датащи(HTML) 174 Page - Freescale Semiconductor, Inc |
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174 / 230 page  Personality EPROM General Release Specification MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0 Personality EPROM 12.3.2 PEPROM Status and Control Register (PESCR) The PEPROM status and control register (PESCR) controls the PEPROM programming voltage. This register also transfers the PEPROM bits to the internal data bus and contains a flag bit when row zero is selected. PEDATA — PEPROM Data This read-only bit is the output state of the PEPROM sense amplifier and shows the state of the currently selected bit. The state of the PEDATA bit does not affect the programming of the bit selected by the PEBSR. Reset does not affect the PEDATA bit. 1 = PEPROM data is a logic one 0 = PEPROM data is a logic zero PEPGM — PEPROM Program Control This read/write bit controls the switches that apply the programming voltage from the IRQ/VPP pin to the selected PEPROM bit cell. When the PEPGM bit is set the selected bit cell will be programmed to a logical one, regardless of the state of the PEDATA bit. Reset clears the PEPGM bit. 1 = Programming voltage applied to array bit 0 = Programming voltage not applied to array bit $000F Bit 7 654321 Bit 0 Read: PEDATA 0 PEPGM 0000 PEPRZF Write: RRR Reset: U 000000 1 = Unimplemented R = Reserved U = Unaffected Figure 12-3. PEPROM Status and Control Register (PESCR) Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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