User guide

Spartan-6 FPGA Configuration User Guide www.xilinx.com 119
UG380 (v2.7) October 29, 2014
Readback Command Sequences
Table 6-2 shows the readback command sequence.
Table 6-2: Shutdown Readback Command Sequence (SelectMAP)
Step SelectMAP Port Direction Configuration Data Explanation
1Write
FFFF Dummy Word
FFFF Dummy Word
FFFF Dummy Word
FFFF Dummy Word
AA99 Sync Word
5566 Sync Word
2Write 2000 Type 1 NOOP Word 0
3Write
30A1 Type 1 Write 1 Word to CMD
000B SHUTDOWN Command
2000
Type 1 NOOP Word 0
REPEAT for 16 cycles.
4Write
30A1 Type 1 Write 1 Word to CMD
0007 RCRC Command
2000 Type 1 NOOP Word 0
5Write
30A1 Type 1 Write 1 Word to CMD
0008 AGHIGH Command
2000 Type 1 NOOP Word 0
6Write
31a1 Type 1 Write 1 Word to FLR
XXXX Framelength
7Write
3022 Type 1 Write 2 Words to FAR
0000 FAR_MAJ = 0000
0000 FAR_MIN = 0000
8Write
30A1 Type 1 Write 1 Word to CMD
0004 RCFG Command
9Write
4880 Type 2 Read 0 Words from FDRO
XXXX Type 2 Read XXXX Words from FDRO
10 Write
2000 Type 1 NOOP Word 0
... Type 1 65 More NOOPs Word 0
11 Read
0000 Packet Data Read FDRO Word 0
...
0000 Packet Data Read FDRO Last Word
12 Write
30A1 Type 1 Write 1 Word to CMD
0003 LFRM Command
2000 Type 1 NOOP Word 0