RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 22

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

1.0 HDSL Systems
1.2 System Interfaces
Figure 1-8. RS8953B System Interfaces
1-8
RMSYNC
TMSYNC
MPUSEL
INSERT
MSYNC
INSDAT
EXCLK
DROP
RSER
INTR*
TSER
TCLK
MCLK
RST*
RCLK
SCLK
1.2 System Interfaces
System interfaces and associated signals for the RS8953B functional circuit
blocks are shown in
and signals are defined in
HDSL Channel 1. HDSL Channels 2 and 3 are not usable. Although only 1 HDSL
channel is usable, the internal registers are not changed from the 3 HDSL channel
versions. The single-pair versions (RS8953SPBEPF and RS8953SPBEPJ) only
supports HDSL Channel 1. HDSL Channels 2 and 3 are not usable. Although
only 1 HDSL channel is usable, the internal registers are not changed from the 3
HDSL channel versions. This means that the registers should be programmed
with the same value as if only HDSL channel 1 was used in a 3 channel version.
This allows the 3 channel version to be used for development, and without a
software change, a single-pair version used for production.
The single-pair version (RS8953SPBEPF and RS8953SPBEPJ) only supports
Channel
DPLL
PCM
Interface
MPU
Conexant
Figure
TLOAD1
TLOAD2
TLOAD3
RAUX1
RAUX2
RAUX3
TAUX1
TAUX2
TAUX3
ROH1
ROH2
ROH3
Table
1-8. Circuit blocks are described in sections 3 and 4,
2-2.
Channel2
Channel3
Channel1
Access
HDSL
HDSL
HDSL
Test
RS8953B/RS8953SPB
HDSL Channel Unit
BCLK1
QCLK1
TDAT1
RDAT1
BCLK2
QCLK2
TDAT2
RDAT2
BCLK3
QCLK3
TDAT3
RDAT3
TCK
TDI
TDO
TMS
N8953BDSB