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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT89LP2052 датащи(PDF) 62 Page - ATMEL Corporation |
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AT89LP2052 датащи(HTML) 62 Page - ATMEL Corporation |
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62 / 90 page  62 3547F–MICRO–6/06 AT89LP2052/LP4052 22.4.7 Read Code Page Function: • Read 1 page (1 to 32 bytes) of data from the Code Memory array. • Page address determined by bits [11:5] of loaded address. • The byte address (offset in page) is initialized to bits [4:0] of the low address byte. The internal address is incremented by one on the negative edge of the XTAL1 pulse. The address will wrap around to the 1st byte of the page when incremented past 31. • Read data will be output on P1 after the falling edge of fourth XTAL1 pulse (address low byte strobe). The programmer should tri-state P1 prior to this edge to avoid bus contention on P1. Usage: 1. Bring CS (P3.2) low. 2. Drive P1 to AAh and pulse XTAL1 high. 3. Drive P1 to 30h and pulse XTAL1 high. 4. Drive P1 with bits [15:8] of address and pulse XTAL1 high. 5. Drive P1 with bits [7:0] of address and bring XTAL1 high. 6. Tri-state P1. 7. Bring XTAL1 low. 8. Read data from P1. 9. To read additional data bytes in the page, pulse XTAL1 high to increment to the next address. 10. Drive CS high. Figure 22-11. Read Code Page Sequence Note: The waveform on this page is not to scale. AAh 30h 0000aaaa aaabbbbb DOUT 0 CS XTAL1 P1 DOUT 1 DOUTn |
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