GD25Q32C datasheet(38/50 Pages) ELM

38 / 50 page

Rev.1.0

50 -

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GD25Q32CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash

7.34. 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.

7.33. Enable Reset (66H) and Reset (99H)

If the Reset command is accepted, any on-going internal operation will be terminated and the device will

return to its default power-on state and lose all the current volatile settings, such as Volatile Status Register bits,

Write Enable Latch status (WEL), Program/Erase Suspend status, Read Parameter setting (P7-P0), Continuous

Read Mode bit setting (M7-M0) and Wrap Bit Setting (W6-W4). The “Reset (99H)” command sequence as

follow: CS# goes low → Sending Enable Reset command → CS# goes high → CS# goes low → Sending

Reset command → CS# goes high. Once the Reset command is accepted by the device, the device will take

approximately tRST=60µs to reset. During this period, no command will be accepted. Data corruption may

happen if there is an on-going or suspended internal Erase or Program operation when Reset command sequence

is accepted by the device. It is recommended to check the BUSY bit and the SUS bit in Status Register before

issuing the Reset command sequence.

Figure 38. Enable Reset and Reset command Sequence Diagram

7.34. Read Serial Flash Discoverable Parameter (5AH)

Figure 39. Read Serial Flash Discoverable Parameter command Sequence Diagram

GD25Q32C Datasheet(PDF) 38 Page - ELM Electronics