RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 79
RS8953
Manufacturer Part Number
RS8953
Description
High-bit-rate Digital Subscriber Line (hdsl) Channel unit
Manufacturer
Conexant Systems, Inc.
Datasheet
1.RS8953.pdf
(173 pages)
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RS8953B/8953SPB
HDSL Channel Unit
TZBIT[47:0]
N8953BDSB
0xDF—Transmit Z-Bits (TZBIT_2)
0xE0—Transmit Z-Bits (TZBIT_3)
0xE1—Transmit Z-Bits (TZBIT_4)
0xE2—Transmit Z-Bits (TZBIT_5)
0xE3—Transmit Z-Bits (TZBIT_6)
7
7
7
7
7
Transmit Z-bits is applicable only in E1_MODE [CMD_1; addr 0xE5]; otherwise, Z-bit
registers are ignored. TZBIT[47:0] holds 48 Z-bits for transmission in the first bit of each of
the 48 payload blocks. (See
Z-bits are individually output for each channel from TZBIT_1. The last 40 Z-bits are output to
all channels from a single set of TZBIT_2–TZBIT_6.
NOTE:
6
6
6
6
6
The system may also supply the last 40 Z-bits individually for each HDSL transmit
channel from the TAUXn inputs by setting TAUX_EN and EXT_ZBIT [TCMD_2;
addr 0x07].
5
5
5
5
5
Figure 3-16
4
4
4
4
4
Conexant
TZBIT[23:16]
TZBIT[31:24]
TZBIT[39:32]
TZBIT[47:40]
TZBIT[15:8]
for Z-bit positions within the frame.) The first eight
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
4.2 HDSL Transmit
4.0 Registers
0
0
0
0
0
4-11
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