E S I
E S I
ADVANCED INFORMATION
Excel Semiconductor inc.
CS#
0
1
2
3
4
5
6
7
8
9
10
28 29 30 31 32 33 34 35 36 37 38 39
SCK
SI
24-Bit Address
Instruction
23
1
22 21
3
2
1
0
0
1
0
1
0
0
1
MSB
Data Out 1
Data Out 2
High Impedance
7
5
4
3
1
0
6
2
7
SO
MSB
Figure 19. Read Parameter Page (RDPARA) Instruction Sequence
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.
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
CS#
0
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
SCK
SI
Dummy Byte
24-Bit Address
Instruction
3
0
7
6
5
4
3
2
1
0
23
1
22 21
2
1
1
0
1
1
0
1
MSB
High Impedance
Data Out 2
7
Data Out 1
7
4
3
2
1
0
6
5
SO
MSB
Figure 20. Fast Read Parameter Page (FRDPARA) Instruction Sequence
24
Rev. 0D May, 11, 2006
ES25P80
EXCELSEMI [ EXCEL SEMICONDUCTOR INC. ]
