GD25Q128C Datasheet, PDF (57/69 Pages) ELM Electronics – 128M-bit Serial Flash

GD25Q128CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
7.38. Read Serial Flash Discoverable Parameter (5AH)
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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_Fig4_u4_r._eR₃e₉a_{. R}d_eS_ae_dr_Sia_el_riF_alla_Fs_lah_shD_Dis_isc_co_ov_ve_er_ra_ab_bll_ee_PP_aa_rr_aa_mm_ete_et_re_cr_oc_mo_mm_am_ndan_Sd_eqS_ue_eq_ncu_een_Dc_iae_gD_ramiagram
Figure 44a. Read Serial Flash Discoverable Parameter command Sequence Diagram (QPI)
CS#
SCLK
IO₀
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Command
5AH _{A23-16 A15-8 A7-0} ^Dummy*
IOs switch from
Input to output
20 16 12 8 4 0 4 0 4 0 4 0 4
IO₁
21 17 13 9 5 1 5 1 5 1 5 1 5
IO₂
22 18 14 10 6 2 6 2 6 2 6 2 6
IO₃
23 19 15 11 7 3 7 3 7 3 7 3 7
Byte1 Byte2
*"Set Read Parameters" Command (C0H)
can set the number of dummy clocks
69 - 57
Rev.1.2