DS3172 Maxim Integrated, DS3172 Datasheet - Page 148
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DS3172
Manufacturer Part Number
DS3172
Description
Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
Manufacturer
Maxim Integrated
Datasheet
1.DS3171.pdf
(234 pages)
Specifications of DS3172
Part # Aliases
90-31720-000
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bits 5 to 3: Transmit Error Insertion Rate (TEIR[2:0]) – These three bits indicate the rate at which errors are
inserted in the output data stream. One out of every 10
of 0 disables error insertion at a specific rate. A TEIR[2:0] value of 1 result in every 10
TEIR[2:0] value of 2 result in every 100
a TEIR[2:0] value that is non-zero. If this register is written to during the middle of an error insertion process, the
new error rate will be started after the next error is inserted.
Bit 2: Bit Error Insertion Enable (BEI) – When 0, single bit error insertion is disabled. When 1, single bit error
insertion is enabled.
Bit 1: Transmit Single Error Insert (TSEI) – This bit causes a bit error to be inserted in the transmit data stream if
manual error insertion is disabled (MEIMS = 0) and single bit error insertion is enabled. A 0 to 1 transition causes a
single bit error to be inserted. For a second bit error to be inserted, this bit must be set to 0, and back to 1. Note: If
MEIMS is low, and this bit transitions more than once between error insertion opportunities, only one error will be
inserted.
Bit 0: Manual Error Insert Mode Select (MEIMS) – When 0, error insertion is initiated by the TSEI register bit.
When 1, error insertion is initiated by the transmit manual error insertion signal (TMEI). Note: If TMEI or TSEI is
one, changing the state of this bit may cause a bit error to be inserted.
TEIR[2:0]
000
001
010
011
100
101
110
111
15
--
--
0
7
0
Error Rate
Disabled
1 x 10
1 x 10
1 x 10
1 x 10
1 x 10
1 x 10
1 x 10
14
--
--
0
6
0
-1
-2
-3
-4
-5
-6
-7
BERT.TEICR
BERT Transmit Error Insertion Control Register
(0,2,4,6)68h
th
TEIR2
bit being inverted. Error insertion starts when this register is written to with
13
--
0
5
0
TEIR1
12
--
0
0
4
n
148
bits is inverted. TEIR[2:0] is the value n. A TEIR[2:0] value
TEIR0
11
--
0
3
0
BEI
10
--
0
2
0
th
TSEI
--
9
0
1
0
bit being inverted. A
MEIMS
--
8
0
0
0
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