DS3172 Maxim Integrated, DS3172 Datasheet - Page 152

• Manufacturer Part Number: DS3172
• Description: Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
• Manufacturer: Maxim Integrated

Specifications of DS3172

• Part # Aliases: 90-31720-000

12.5 B3ZS/HDB3 Line Encoder/Decoder
12.5.1 Transmit Side Line Encoder/Decoder Register Map
The transmit side utilizes one register.
Table 12-15. Transmit Side B3ZS/HDB3 Line Encoder/Decoder Register Map
12.5.1.1 Register Bit Descriptions
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit #
Name
Default
Bit 4: Transmit Zero Suppression Encoding Disable (TZSD) – When 0, the B3ZS/HDB3 Encoder performs zero
suppression (B3ZS or HDB3) and AMI encoding. When 1, zero suppression (B3ZS or HDB3) encoding is disabled,
and only AMI encoding is performed.
Bit 3: Excessive Zero Insert Enable (EXZI) – When 0, excessive zero (EXZ) event insertion is disabled. When 1,
EXZ event insertion is enabled.
Bit 2: Bipolar Violation Insert Enable (BPVI) – When 0, bipolar violation (BPV) insertion is disabled. When 1,
BPV 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.
(0,2,4,6)8Ch
(0,2,4,6)8Eh
Address
15
--
--
0
7
0
LINE.TCR
Register
14
--
0
--
6
0
--
LINE.TCR
Line Transmit Control Register
(0,2,4,6)8Ch
13
Line Transmit Control Register
Unused
--
0
--
5
0
Register Description
TZSD
12
--
0
0
4
152
EXZI
11
--
0
3
0
BPVI
10
--
0
2
0
TSEI
--
9
0
1
0
MEIMS
--
8
0
0
0