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AM28F256 Datasheet(PDF) 17 Page - Advanced Micro Devices |
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AM28F256 Datasheet(HTML) 17 Page - Advanced Micro Devices |
17 / 35 page Am28F256 17 Table 5. Flashrite Programming Algorithm Notes: 1. See AC and DC Characteristics for values of VPP parameters. The VPP power supply can be hard-wired to the device or switchable. When VPP is switched, VPPL may be ground, no connect with a resistor tied to ground, or less than VCC + 2.0 V. 2. Program Verify is performed only after byte programming. A final read/compare may be performed (optional) after the register is written with the read command. Bus Operations Command Comments Standby Wait for VPP Ramp to VPPH (Note 1) Initialize Pulse counter Write Program Setup Data = 40h Program Valid Address/Data Standby Duration of Programming Operation (tWHWH1) Write Program-Verify (Note 2) Data = C0h Stops Program Operation Standby Write Recovery Time before Read = 6 µs Read Read Byte to Verify Programming Standby Compare Data Output to Data Expected Write Reset Data = FFh, resets the register for read operations. Standby Wait for VPP Ramp to VPPL (Note 1) |
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