DS3172 Maxim Integrated, DS3172 Datasheet - Page 196
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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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Bit 1: Transmit Frame Generation Control (TFGC) – When this bit is zero, the Transmit Frame Processor frame
generation is enabled. The E3 overhead positions in the incoming E3 payload will be overwritten with the internally
generated DS3 overhead. When this bit is one, the Transmit Frame Processor frame generation is disabled. The
E3 overhead positions in the incoming E3 payload will be passed through to error insertion. Note: The E3 overhead
periods can still be overwritten by overhead insertion.
Bit 0: Transmit Alarm Indication Signal (TAIS) – When 0, the normal signal is transmitted. When 1, the E3
output data stream is forced to all ones (AIS).
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bit 9: Continuous Remote Error Indication Error Insertion Enable (CFBEIE) – When 0, single remote error
indication (REI) error insertion is enabled. When 1, continuous REI error insertion is enabled, and REI errors will be
transmitted continuously if FEBI is high.
Bit 8: Remote Error Indication Error Insertion Enable (FBEI) – When 0, REI error insertion is disabled. When 1,
REI error insertion is enabled.
Bit 7: Parity Block Error Enable (PBEE) – When 0, a parity error is generated by inverting a single bit in the EM
byte. When 1, a parity error is generated by inverting all eight bits in the EM byte.
Bit 6: Continuous Parity Error Insertion Enable (CPEIE) – When 0, single parity (BIP-8) error insertion is
enabled. When 1, continuous parity error insertion is enabled, and parity errors will be transmitted continuously if
PEI is high.
Bit 5: Parity Error Insertion Enable (PEI) – When 0, parity error insertion is disabled. When 1, parity error
insertion is enabled.
Bits 4 to 3: Framing Error Control (FEIC[1:0]) – These two bits control the framing error event to be inserted.
Bit 2: Framing Error Insertion Enable (FEI) – When 0, framing error insertion is disabled. When 1, framing error
insertion is enabled.
Bit 1: Transmit Single Error Insert (TSEI) – This bit causes an error of the enabled type(s) to be inserted in the
transmit data stream if manual error insertion is disabled (MEIMS = 0). A 0 to 1 transition causes a single error to
be inserted. For a second 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 an error to be inserted.
00 = single bit error in one frame.
01 = word error in one frame.
10 = single bit error in four consecutive frames.
11 = word error in four consecutive frames.
PBEE
15
--
0
7
0
CPEIE
14
--
0
6
0
E3G832.TEIR
E3 G.832 Transmit Error Insertion Register
(1,3,5,7)1Ah
PEI
13
--
0
5
0
FEIC1
12
--
0
0
4
196
Reserved
FEIC0
11
0
3
0
Reserved
FEI
10
0
2
0
CFBEIE
TSEI
9
0
1
0
MEIMS
FBEI
8
0
0
0
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