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Programmable Logic Device:
Serial Presence Detect (SPD)
Pm8560 User’s Manual
10006609-03
8-22
CYCTWHNS:
Cycle Time Whole Nanoseconds (ns) defines the minimum cycle time for the CAS latency
specified for the on-board DDR SDRAM (whole nanosecond).
0000 Reserved
0001 1 ns
0010 2 ns
0011 3 ns
...
1110 14 ns
1111 15 ns
CYCTTENS:
Cycle Time Tenth Nanoseconds defines the minimum cycle time for the CAS latency speci-
fied for the on-board DDR SDRAM (tenth of nanosecond).
0000 + 0 ns
0001 + .1 ns
0010 + .2 ns
...
1000 + .8 ns
1111 + .9 ns
Minimum Row Precharge Time
Register 8-26:
SPD Minimum Row Precharge Time (SPDMRP), 0x6C
TRPWHNS:
Minimum Row Precharge Time for the on-board DDR SDRAM (whole nanosecond granular-
ity)
000000 Reserved
000001 1 ns
000010 2 ns
000011 3 ns
...
111110 62 ns
111111 63 ns
TRPQTRNS:
Minimum Row Precharge Time for the on-board DDR SDRAM (quarter nanosecond granu-
larity)
00 + 0 ns
01 + .25 ns
10 + .50 ns
11 + .75 ns
7
6
5
4
3
2
1
0
TRPWHNS
TRPQTRNS
Summary of Contents for Pm8560
Page 8: ...Contents continued Pm8560 User s Manual 10006609 03 vi ...
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Page 14: ...Pm8560 User s Manual 10006609 03 ii blank page ...
Page 36: ...Setup Troubleshooting Pm8560 User s Manual 10006609 03 2 12 ...
Page 54: ...Serial I O Baud Rate Selection Pm8560 User s Manual 10006609 03 5 4 ...
Page 62: ...TDM Interface Rear Panel I O Connector P14 Pm8560 User s Manual 10006609 03 6 8 ...
Page 72: ...PCI Bus Interface PMC Connector Pin Assignments Pm8560 User s Manual 10006609 03 7 10 ...
Page 112: ...Development Mezzanine Card Troubleshooting Pm8560 User s Manual 10006609 03 10 12 ...
Page 138: ...Monitor Download Formats Pm8560 User s Manual 10006609 03 11 26 ...
Page 144: ...Index continued Pm8560 User s Manual 10006609 03 i 4 ...