ES25P80 Datasheet, PDF (24/35 Pages) Excel Semiconductor Inc. – 8Mbit CMOS 3.0 Volt Flash Memory with 75Mhz SPI Bus Interface

ADVANCED INFORMATION
EE SS II
Excel Semiconductor inc.
CS#
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10
28 29 30 31 32 33 34 35 36 37 38 39
Instruction
24-Bit Address
0 1 0 1 0 0 1 1 ^{23 22 21}
MSB
High Impedance
3210
Data Out 1
Data Out 2
7 6 5 43 2 1 07
MSB
Figure 19. Read Parameter Page (RDPARA) Instruction Sequence
Fast Read Parameter Page(FRDPARA)
The Fast Read Parameter Page instruction is basi-
cally the same as the Read Parameter Page
instruction except that it allows for a faster clock
rate to be used. The Fast Read Parameter Page
instruction can opperate at clock frequency D.C. to
a maximum of F_SCK .
This is accomplished by adding a dummy byte after
the 24-bit address, as shown in figure 20. The
dummy byte allows the devices internal circuits
additional time for setting up the initial address. the
dummy byte data value on the SI pin is a don’t care.
CS#
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
Instruction
24-Bit Address
Dummy Byte
0 1 0 1 1 0 1 1 ^{23 22 21}
3 21 0 7 6 5 4 3 2 1 0
MSB
High Impedance
Data Out 1
Data Out 2
76543210 7
MSB
Figure 20. Fast Read Parameter Page (FRDPARA) Instruction Sequence
ES25P80
24
Rev. 0D May, 11, 2006