Serial Configuration Devices (EPCS1, EPCS4, EPCS16 & EPCS64) Data Sheet
Figure 4–13. Write Bytes Operation Timing Diagram
DCLK
ASDI
Operation Code
MSB
MSB
MSB
MSB
23
22
21
24-Bit Address
3
2
1
0
7
6
5
Data Byte 1
Data Byte 2
Data Byte 256
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
2072 2073 2074 2075 2076 2077 2078 2079
nCS
0
1
2
3
4
5
6
7
8
9
10
Note to
(1)
Address bits
A[23..19]
are don’t care bits in the PCS4 device. Address bits
A[23..17]
are the don’t care bits in
the EPCS1 device.
Altera Corporation
July 2004
Core Version a.b.c variable
4–21
Configuration Handbook, Volume 2