|
GD25QL32CXIGX Datasheet, PDF (24/62 Pages) ELM Electronics – 1.8V Uniform Sector Dual and Quad Serial Flash | |||
|
◁ |
GD25LQ32CxIGx 1.8V Uniform Sector Dual and Quad Serial Flash
Quad I/O Fast Read with âContinuous Read Modeâ
http://www.elm-tech.com
The Quad I/O Fast Read command can further reduce command overhead through setting the âContinuous
Read Modeâ bits (M7-0) after the input 3-byte address (A23-A0). If the âContinuous Read Modeâ bits (M5-4)
= (1, 0), then the next Quad I/O Fast Read command (after CS# is raised and then lowered) does not require the
EBH command code. The command sequence is shown in followed Figure12a. If the âContinuous Read Modeâ
bits (M5-4) do not equal to (1, 0), the next command requires the first EBH command code, thus returning
to normal operation. A âContinuous Read Modeâ Reset command can be used to reset (M5-4) before issuing
normal command.
Figure 12. Quad I/O Fast Read Sequence Diagram (M5-4 â (1, 0))
CS#
SCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
SI(IO0)
Command
EBH
40404040
4040 4
SO(IO1)
51515151
5151 5
WP#(IO2)
62626262
6262 6
HOLD#(IO3)
73737373
A23-16 A15-8 A7-0 M7-0
Dummy
7373 7
Byte1 Byte2
Figure 12a. Quad I/O Fast Read Sequence Diagram (M5-4 = (1, 0))
CS#
SCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
SI(IO0)
SO(IO1)
WP#(IO2)
HOLD#(IO3)
40404040
4040 4
51515151
5151 5
62626262
6262 6
73737373
A23-16 A15-8 A7-0 M7-0
Dummy
7373 7
Byte1 Byte2
Quad I/O Fast Read with â8/16/32/64-Byte Wrap Aroundâ in Standard SPI mode
The Quad I/O Fast Read command can be used to access a specific portion within a page by issuing âSet Burst
with Wrapâ (77H) commands prior to EBH. The âSet Burst with Wrapâ (77H) command can either enable or
disable the âWrap Aroundâ feature for the following EBH commands. When âWrap Aroundâ is enabled, the
data being accessed can be limited to either an 8/16/32/64-byte section of a 256-byte page. The output data
starts at the initial address specified in the command, once it reaches the ending boundary of the 8/16/32/64-byte
section, the output will wrap around the beginning boundary automatically until CS# is pulled high to terminate
the command.
62 - 24
Rev.1.0
|
▷ |