ep2sgx60e Altera Corporation, ep2sgx60e Datasheet - Page 29

• Manufacturer Part Number: ep2sgx60e
• Description: 4. Serial Configuration Devices Epcs1, Epcs4, Epcs16, Epcs64, And Epcs128 Data Sheet
• Manufacturer: Altera Corporation

Figure 4–12. Read Silicon ID Operation Timing Diagram
Note to
(1)
Altera Corporation
May 2008
DCLK
DATA
ASDI
nCS
Only EPCS1, EPCS4, EPCS16, and EPCS64 support Read Silicon ID operation.
Figure
Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
4–12:
0
High Impedance
1
2
Operation Code
3
Table 4–21
The device implements the read silicon ID operation by driving nCS low
then shifting in the read silicon ID operation code followed by three
dummy bytes on ASDI. The serial configuration device’s 8-bit silicon ID
is then shifted out on the DATA pin on the falling edge of DCLK, as shown
in
driving nCS high after the silicon ID has been read at least once. Sending
additional clock cycles on DCLK while nCS is driven low can cause the
silicon ID to be shifted out repeatedly.
Read Device Identification Operation
The read device identification operation code is b’1001 1111, with the
MSB listed first. Only EPCS128 supports this operation. It reads the serial
configuration device’s 8-bit device identification from the DATA output
pin. If this operation is shifted in during an erase or write cycle, it is
ignored and has no effect on the cycle that is in progress.
shows the serial configuration device identification.
4
Table 4–21. Serial Configuration Device Silicon ID
Figure
5
Serial Configuration Device
6
4–12. The device can terminate the read silicon ID operation by
7
MSB
shows the serial configuration device silicon IDs.
23
8
EPCS16
EPCS64
EPCS1
EPCS4
22
9
21
10
Three Dummy Bytes
Note (1)
3
28
2
29
1
30
Configuration Handbook, Volume 2
0
31
MSB
7
32
Silicon ID (Binary Value)
6
33
b'0001 0000
b'0001 0010
b'0001 0100
b'0001 0110
5
34
4
35
Silicon ID
3
36
Table 4–22
2
37
1
38
0
39
4–29