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M27W512-100K6 数据表(PDF) 9 Page - STMicroelectronics |
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M27W512-100K6 数据表(HTML) 9 Page - STMicroelectronics |
9 / 22 page M27W512 Device operation 9/22 Figure 3. Programming flowchart 2.5 Programming The M27W512 has been designed to be fully compatible with the M27C512 and has the same electronic signature. As a result, the M27W512 can be programmed as the M27C512 on the same programming equipment applying 12.75V on VPP and 6.25V on VCC. The M27W512 can use PRESTO IIB Programming Algorithm that drastically reduces the programming time. Nevertheless to achieve compatibility with all programming equipment, PRESTO II Programming Algorithm can be used as well. When delivered, all bits of the M27W512 are in the '1' state. Data is introduced by selectively programming '0's into the desired bit locations. Although only '0's will be programmed, both '1's and '0's can be present in the data word. The M27W512 is in the programming mode when VPP input is at 12.75V and E is pulsed to VIL. The data to be programmed is applied to 8 bits in parallel to the data output pins. The levels required for the address and data inputs are TTL. VCC is specified to be 6.25V ± 0.25V. AI00738C n = 0 Last Addr VERIFY E = 100 μs Pulse ++n = 25 ++ Addr VCC = 6.25V, VPP = 12.75V FAIL CHECK ALL BYTES 1st: VCC = 5V 2nd: VCC = 2.7V YES NO YES NO YES NO SET MARGIN MODE RESET MARGIN MODE |
类似零件编号 - M27W512-100K6 |
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类似说明 - M27W512-100K6 |
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