GD25LQ40XIGX Datasheet, PDF (18/59 Pages) ELM Technology Corporation – 1.8V Uniform Sector Dual and Quad Serial Flash

GD25LQ40xIGx 1.8V Uniform Sector Dual and Quad Serial Flash
7.4. Read Status Register (RDSR) (05H or 35H)
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The Read Status Register (RDSR) command is for reading the Status Register. The Status Register may be read
at any time, even while a Program, Erase or Write Status Register cycle is in progress. When one of these cycles
is in progress, it is recommended to check the Write In Progress (WIP) bit before sending a new command to
the device. It is also possible to read the Status Register continuously. For command code “05H”, the SO will
output Status Register bits S7~S0. The command code “35H”, the SO will output Status Register bits S15~S8.
Figure 5. Read Status Register Sequence Diagram
CS#
SCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Command
SI
05H or 35H
SO
High-Z
S7~S0 or S15~S8 out
S7~S0 or S15~S8 out
76543210765432107
MSB
MSB
Figure 5a. Read Status Register Sequence Diagram (QPI)
CS#
SCLK
IO₀
012345
Command
05H or 35H
40 4 04
IO₁
51 515
IO₂
6262 6
IO₃
7 3 7 37
S7-S0 or S15-S8 out
59 - 18
Rev.1.0