DS3172N Maxim Integrated, DS3172N Datasheet - Page 146
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DS3172N
Manufacturer Part Number
DS3172N
Description
Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
Manufacturer
Maxim Integrated
Datasheet
1.DS3171.pdf
(234 pages)
Specifications of DS3172N
Part # Aliases
90-31720-N00
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bits 12 to 8: Pattern Tap Feedback (PTF[4:0]) – These five bits control the PRBS “tap” feedback of the pattern
generator. The “tap” feedback will be from bit y of the pattern generator (y = PTF[4:0] +1). These bits are ignored
when programmed for a repetitive pattern. For a PRBS signal, the feedback is an XOR of bit n and bit y.
Bit 6: QRSS Enable (QRSS) – When 0, the pattern generator configuration is controlled by PTS, PLF[4:0], and
PTF[4:0], and BSP[31:0]. When 1, the pattern generator configuration is forced to a PRBS pattern with a
generating polynomial of x
output bits are all zero.
Bit 5: Pattern Type Select (PTS) – When 0, the pattern is a PRBS pattern. When 1, the pattern is a repetitive
pattern.
Bits 4 to 0: Pattern Length Feedback (PLF[4:0]) – These five bits control the “length” feedback of the pattern
generator. The “length” feedback will be from bit n of the pattern generator (n = PLF[4:0] +1). For a PRBS signal,
the feedback is an XOR of bit n and bit y. For a repetitive pattern the feedback is bit n.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bits 15 to 0: BERT Seed/Pattern (BSP[15:0]) – Lower sixteen bits of 32 bits. Register description follows next
register.
BSP15
BSP7
15
15
--
--
0
7
0
0
7
0
BSP14
QRSS
20
BSP6
14
14
--
+ x
0
6
0
0
6
0
17
BERT.PCR
BERT Pattern Configuration Register
(0,2,4,6)62h
BERT.SPR1
BERT Seed/Pattern Register #1
(0,2,4,6)64h
+ 1. The output of the pattern generator will be forced to one if the next fourteen
BSP13
BSP5
PTS
13
13
--
0
5
0
0
5
0
BSP12
BSP4
PTF4
PLF4
12
12
0
0
0
0
4
4
146
BSP11
BSP3
PTF3
PLF3
11
11
0
3
0
0
3
0
BSP10
BSP2
PTF2
PLF2
10
10
0
2
0
0
2
0
BSP9
BSP1
PTF1
PLF1
9
0
1
0
9
0
1
0
BSP8
BSP0
PTF0
PLF0
8
0
0
0
8
0
0
0
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