ds26518 Maxim Integrated Products, Inc., ds26518 Datasheet - Page 230

• Manufacturer Part Number: ds26518
• Description: 8-port T1/e1/j1 Transceiver
• Manufacturer: Maxim Integrated Products, Inc.

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 7: Manual Transmit AIS (TAIS). Alarm Indication Signal (AIS) is sent using MCLK as the reference clock. The
transmit data coming from the framer is ignored.
Bit : Automatic Transmit AIS (ATAIS)
Bits 5 to 3: Loopback Selection (LB[2:0]. See
Bit 2: Transmit Power-Down Enable (TPDE)
Bit 1: Receiver Power-Down Enable (RPDE)
Bit 0: Transmit Enable (TE). This function is overridden by the TXENABLE pin.
LB2
0
0
0
0
1
1
1
1
LB1
0 = TAIS is disabled.
1 = Output an unframed all-ones pattern (AIS) at TTIPn and TRINGn.
0 = ATAIS is disabled.
1 = Automatically transmit AIS on the occurrence of an LIU LOS.
0 = Transmitter power enabled.
1 = Transmitter powered down. TTIPn/TRINGn outputs are high impedance.
0 = Receiver power enabled.
1 = Receiver powered down.
0 = TTIPn/TRINGn outputs are high impedance.
1 = TTIPn/TRINGn outputs enabled.
0
0
1
1
0
0
1
1
TAIS
LB0
7
0
0
1
0
1
0
1
0
1
No loopback selected
Remote Loopback 2 (includes jitter attenuator)
Analog Loopback
Remote Loopback 1 (no jitter attenuator)
Local Loopback (includes jitter attenuator)
Dual Loopback—Remote Loopback 1 and Local Loopback (jitter
attenuator is included in Local Loopback)
Reserved
Reserved
LMCR
LIU Maintenance Control Register
1002h + (20h x (n - 1)) : where n = 1 to 8
ATAIS
6
0
LB2
5
0
Figure 9-26
Loopback Selection
230 of 286
LB1
4
0
for more details on each loopback.
LB0
3
0
DS26518 8-Port T1/E1/J1 Transceiver
TPDE
2
0
RPDE
1
0
TE
0
0