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AT89C55WD Folha de dados(PDF) 23 Page - ATMEL Corporation |
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AT89C55WD Folha de dados(HTML) 23 Page - ATMEL Corporation |
23 / 37 page 23 AT89C55WD 1921B–MICRO–09/02 Programming Interface Every code byte in the Flash array can be programmed by using the appropriate combination of control signals. The write operation cycle is self-timed and once initiated, will automatically time itself to completion. Most worldwide major programming vendors offer support for the Atmel microcontroller series. Please contact your local programming vendor for the appropriate software revision. Notes: 1. Write Code Data requires a 200 ns PROG pulse. 2. Write Lock Bits requires a 100 µs PROG pulse. 3. Chip Erase requires a 200 ns - 500 ns PROG pulse. 4. RDY/BSY signal is output on P3.0 during programming. Table 10. Flash Programming Modes Mode V CC RST PSEN ALE/ PROG EA/ V PP P2.6 P2.7 P3.3 P3.6 P3.7 P0.7-0 Data P3.4 P2.5-0 P1.7-0 Address WriteCodeData 5V H L (1) 12V L H H H H D IN A14 A13-8 A7-0 Read Code Data 5V H L H H/12V L L L H H D OUT A14 A13-8 A7-0 Write Lock Bit 1 6.5V H L (2) 12V H H H H H X X X X Write Lock Bit 2 6.5V H L (2) 12V H H H L L X X X X Write Lock Bit 3 6.5V H L (2) 12V H L H H L X X X X Read Lock Bits 1, 2, 3 5V H L H H H H L H L P0.2, P0.3, P0.4 XX X Chip Erase 6.5V H L (3) 12V H L H L L X X X X Read Atmel ID 5V H L H H L L L L L 1EH X XX 0000 00H Read Device ID 5V H L H H L L L L L 55H X XX 0001 00H Read Device ID 5V H L H H L L L L L 06H X XX 0010 00H |
Nº de peça semelhante - AT89C55WD_02 |
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Descrição semelhante - AT89C55WD_02 |
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