DS33R41+ Maxim Integrated Products, DS33R41+ Datasheet - Page 75

• Manufacturer Part Number: DS33R41+
• Description: IC TXRX ETHERNET MAP 400-BGA
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of DS33R41+

• Number Of Drivers/receivers: 4/4
• Protocol: T1/E1/J1
• Voltage - Supply: 3.14 V ~ 3.47 V
• Mounting Type: Surface Mount
• Package / Case: 400-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS33R41 Inverse-Multiplexing Ethernet Mapper with Quad Integrated T1/E1/J1 Transceivers
10.6.1 Per-Channel Payload Loopback
The per-channel loopback registers (PCLRs) determine which channels (if any) from the backplane should be
replaced with the data from the receive side or, i.e., off of the T1 or E1 line. If this loopback is enabled, then
transmit and receive clocks and frame syncs must be synchronized. One method to accomplish this is to connect
RCLKn to TCLKT and RFSYNC to TSYNC. There are no restrictions on which channels can be looped back or on
how many channels can be looped back.
Each of the bit positions in the per-channel loopback registers (TR.PCLR1/TR.PCLR2/TR.PCLR3/TR.PCLR4)
represents a DS0 channel in the outgoing frame. When these bits are set to a 1, data from the corresponding
receive channel replaces the data on TSERI for that channel.
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