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GD25Q128CXIGX Datasheet(PDF) 57 Page - ELM Electronics |
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GD25Q128CXIGX Datasheet(HTML) 57 Page - ELM Electronics |
57 / 69 page ![]() 57 Rev.1.2 69 - http://www.elm-tech.com GD25Q128CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash 7.38. Read Serial Flash Discoverable Parameter (5AH) The Serial Flash Discoverable Parameter (SFDP) standard provides a consistent method of describing the functional and feature capabilities of serial flash devices in a standard set of internal parameter tables. These parameter tables can be interrogated by host system software to enable adjustments needed to accommodate divergent features from multiple vendors. The concept is similar to the one found in the Introduction of JEDEC Standard, JESD68 on CFI. SFDP is a standard of JEDEC Standard No.216. Figure 44. Read Serial Flash Discoverable Parameter command Sequence Diagram Figure 39. Read Serial Flash Discoverable Parameter command Sequence Diagram Figure 44a. Read Serial Flash Discoverable Parameter command Sequence Diagram (QPI) CS# SCLK IO0 IO1 IO2 IO3 0 1 2 3 4 5 Command 5AH 20 12 16 8 6 7 8 9 10 4 4 0 0 4 0 4 0 4 21 13 17 9 5 5 1 1 5 1 5 1 5 22 14 18 10 6 6 2 2 6 2 6 2 6 23 15 19 11 7 7 3 3 7 3 7 3 7 A23-16 A15-8 A7-0 Dummy* 11 12 13 IOs switch from Input to output Byte1 Byte2 *"Set Read Parameters" Command (C0H) can set the number of dummy clocks |
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