DS823 Datasheet, PDF (14/33 Pages) Xilinx, Inc – DIP-4 and DIP-2 parity generation and verification

LogiCORE IP SPI-4.2 v12.2
X-Ref Target - Figure 4
31
0x000
0x004
0x1F8
0x1FC
Calendar 3
... ^{Calendar 7}
Calendar 507
Calendar 511
23
Calendar 2
... ^{Calendar 6}
Calendar 506
Calendar 510
15
Calendar 1
... ^{Calendar 5}
Calendar 505
Calendar 509
7
0
Calendar 0
... ^{Calendar 4}
Calendar 504
Calendar 508
31
0x200
0x204
0x2F8
0x2FC
R
R _...
R
R
23
Ch3
Ch7
Ch251
Ch255
R
R _...
R
R
15
Ch2
Ch6
Ch250
Ch254
R
R _...
R
R
7
Ch1
Ch5
Ch249
Ch253
R
R _...
R
R
0
Ch0
Ch4
Ch254
Ch252
31
0x300
0x304
0x308
0x30C
23
15
R
NumTrainSequences[3:0]
R
SnkCalendarLen[8:0]
R
SnkAFThresAssert[8:0]
R
R
R
R
R
7
0
NumDip4Errors[3:0]
SnkCalendarM[7:0]
SnkAFThresNegate[8:0]
FifoAFMode[1:0]
Figure 4: Sink AXI4-Lite Memory Space
RSClkDiv
RSClkPhase
Table 5: Sink Static Configuration Parameter Definition
Name
Range
Description
NumDip4Errors[3:0]
1-15; Value of 0
gets set to 1.
Number of DIP-4 Errors. The Sink interface goes out-of-
frame (assert SnkOof) and stops accepting data from the SPI-
4.2 bus after receiving NumDip4Errors consecutive DIP-4
errors.
NumTrainSequences[3:0]
1-15; Value of 0
gets set to 1.
Number of Complete Training Sequences. A complete
training pattern consists of 10 training control words and 10
training data words. The Sink interface requires
NumTrainSequences consecutive training patterns before
going in frame (deasserting SnkOof) and accepting data from
the SPI-4.2 bus.
SnkCalendar_M[7:0]
0-255
(effective range
1-256)
Sink Calendar Period. The SnkCalendar_M parameter sets
the number of repetitions of the calendar sequence before the
DIP-2 parity and framing words are inserted.
The core implements this parameter as a static register
programmed by the AXI4-Lite interface, and it can be updated
in circuit by first deasserting SnkEn.
Note that the Sink Calendar Period equals SnkCalendar_M +
1. For example, if SnkCalendar_M=22, the Sink Calendar
Period will be equal to 23.
14
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DS823 July 25, 2012
Product Specification