Datasheet

DS26521 Single T1/E1/J1 Transceiver
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Register Name:
PCL1, PCL2, PCL3, PCL4
Register Description:
Per-Channel Loopback Enable Registers 1 to 4
Register Address:
1D0h, 1D1h, 1D2h, 1D3h
Bit #
(MSB) (LSB)
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1
PCL1
CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9
PCL2
CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17
PCL3
Name
CH32 CH31 CH30 CH29 CH28 CH27 CH26 CH25
PCL4
(E1 Mode
Only)
Default 0 0 0 0 0 0 0 0
Bits 7 to 0: Per-Channel Loopback Enable for Channels 1 to 32 (CH[1:32]).
0 = loopback disabled
1 = enable loopback; source data from the corresponding receive channel
Register Name:
TBPCS1, TBPCS2, TBPCS3, TBPCS4
Register Description:
Transmit BERT Port Channel Select Registers 1 to 4
Register Address:
1D4h, 1D5h, 1D6h, 1D7h
Bit # (MSB) 7 6 5 4 3 2 1 0 (LSB)
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1
TBPCS1
CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9
TBPCS2
CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17
TBPCS3
Name
CH32 CH31 CH30 CH29 CH28 CH27 CH26 CH25
TBPCS4
(E1 Mode
Only)
Default 0 0 0 0 0 0 0 0
Setting any of the CH[1:32] bits in the TBPCS1:TBPCS4 registers will enable the transmit BERT clock for the
associated channel time, and allow mapping of the selected channel data out of the receive BERT port. Multiple or
all channels can be selected simultaneously.