RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 107

• Manufacturer Part Number: RS8953
• Description: High-bit-rate Digital Subscriber Line (hdsl) Channel unit
• Manufacturer: Conexant Systems, Inc.

RS8953B/8953SPB
HDSL Channel Unit
4.10 Data Path Options
Table 4-7. Data Path Options Write Registers
DBANK_1[7:0]
DBANK_2[7:0]
N8953BDSB
0xDC—Data Bank Pattern 1 (DBANK_1)
0xDD—Data Bank Pattern 2 (DBANK_2)
Address
0xDD
0xDC
0xDE
0xED
0xEA
0xE4
0xEE
0xF2
7
7
Register Label
COMBINE_TBL
ROUTE_TBL
FILL_PATT
RSIG_TBL
Data Bank Pattern 1—Holds an 8-bit programmable pattern that can be used to replace
transmit HDSL payload bytes and/or receive PCM timeslots according to the Transmit Payload
Map [TMAP; addr 0x08] and the Receive Combination Table [COMBINE_TBL; addr 0xEE]
selections. Both transmit and receive can simultaneously use the same DBANK contents.
DBANK_1[0] is the first bit inserted in the selected direction.
Data Bank Pattern 2—Provides another 8-bit pattern for insertion in transmit HDSL payload
bytes or receive PCM timeslots. See DBANK_1 above. Multiple DBANK registers may be
needed to fill transmit HDSL payload bytes reserved by ETSI standards for future
applications. For example, ETSI specifies R and Y bytes within a 2E1 payload block that are
currently set to all 1s.
DBANK_1
DBANK_2
DBANK_3
TSTUFF
The following configuration can cause the HDSL frame to become corrupted:
DBank_1, DBank_2, or DBank_3 is the source of data for HDSL payload byte 33.
TFIFO or DBank_1 is the source of data for HDSL payload byte 0.
The LSB or the DBank_1 pattern is equal to one (1).
6
6
5
5
Bits
8
8
8
8
4
7
6
4
Data Bank Pattern 1
Data Bank Pattern 2
Data Bank Pattern 3
Programmable Fill Pattern (Data Bank Pattern 4)
Transmit Stuff Bit Value
Transmit Routing Table
Receive Combination Table
Receive Signaling Table
4
4
Conexant
DBANK_1[7:0]
DBANK_2[7:0]
3
3
Name/Description
2
2
1
1
4.10 Data Path Options
4.0 Registers
0
0
4-39