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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LS80C52 датащи(PDF) 20 Page - Intel Corporation |
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LS80C52 датащи(HTML) 20 Page - Intel Corporation |
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20 / 23 page  8XC525458 272336 – 21 See Table 4 for proper input on these pins Figure 10 Programming the EPROM PROGRAMMING ALGORITHM Refer to Table 4 and Figures 10 and 11 for address data and control signals set up To program the 87C5X the following sequence must be exercised 1 Input the valid address on the address lines 2 Input the appropriate data byte on the data lines 3 Activate the correct combination of control sig- nals 4 Raise EA VPP from VCC to 1275V g025V 5 Pulse ALEPROG 5 times for the EPROM ar- ray and 25 times for the encryption table and the lock bits Repeat 1 through 5 changing the address and data for the entire array or until the end of the object file is reached PROGRAM VERIFY Program verify may be done after each byte or block of bytes is programmed In either case a complete verify of the programmed array will ensure reliable programming of the 87C5X The lock bits cannot be directly verified Verification of the lock bits is done by observing that their fea- tures are enabled 272336 – 22 Figure 11 Programming Signal’s Waveforms 20 |
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