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参数资料
型号： WJLXT384LEB1
厂商： CORTINA SYSTEMS INC
元件分类： 数字传输电路
英文描述： DATACOM, PCM TRANSCEIVER, PQFP144
封装： 20 X 20MM, ROHS COMPLIANT, LQFP-144
文件页数： 69/140页
文件大小： 1514K
代理商： WJLXT384LEB1
34
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Intel LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
5.4
Line Interface Unit Signals
For multi-function pins, the pin name in blue bold print indicates the signal being discussed.
Table 10. Line Interface Unit Signals (Sheet 1 of 3)
Signal
Name
QFP
Pin
PBGA
Ball
Signal
Type
Signal Description
D7 / LOOP7
D6 / LOOP6
D5 / LOOP5
D4 / LOOP4
D3 / LOOP3
D2 / LOOP2
D1 / LOOP1
D0 / LOOP0
28
27
26
25
24
23
22
21
K1
J1
J2
J3
J4
H2
H3
G2
DI/O
Loopback Mode Input/Output.
When the LXT384 Transceiver is in the Hardware mode and a
LOOPx pin is:
Low, the LXT384 Transceiver enters Remote loopback.
This mode ignores data on TPOS and TNEG, although a
TCLK input is still required. An option is to connect RCLK
to TCLK externally, outside the transceiver.
Data received on RTIP and RRING is looped around and
retransmitted on TTIP and TRING.
In data recovery mode, the pulse template cannot be
guaranteed while in a remote loopback. (For details, see
Section 6.7.3, “Remote Loopback”.)
High, the LXT384 Transceiver enters Analog loopback.
This mode ignores data received on RTIP and RRING.
Data transmitted on TTIP and TRING is internally looped
around and routed back to the receive inputs. (For details,
see Section 6.7.1, “Analog Loopback”.)
Left unconnected, LOOPx stays in a high-impedance tristate.
Loopback is no longer selected.
If the LXT384 Transceiver is used in Hardware mode, to
minimize cross-talk, the layout design must not route
signals with fast transitions near the LOOP7:0 pins. Also
maintain a solid ground plane under these pins.
When the LXT384 Transceiver is in the Host Processor mode with
a:
Parallel interface, see the signal descriptions for D7:0 in
Section 5.2, “Microprocessor-Standard Bus and Interface
Signals”.
Serial interface, LOOP7:0 must be grounded.
For other pin functions, see D7:0 in Section 5.2, “Microprocessor-
Standard Bus and Interface Signals”.
1. AI: Analog Input. AO: Analog Output. DI: Digital Input. DI/O: Digital Bidirectional Port. DO: Digital Output.
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