XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
REV. 1.0.1
10.2
Transmit/Receive High-Speed Back-Plane Interface
The High-speed Back-plane Interface supports payload data to be taken from or presented to the Terminal
Equipment at different data rates. In the non-multiplexed mode, payload data of each channel are interfaced to
the Terminal Equipment separately. Each channel uses its own serial clock, serial data, single-frame
synchronization signal and multi-frame synchronization signals.
10.2.1
Non-Multiplexed High-Speed Mode
When the Back-plane interface data rate is MVIP 2.048Mbit/s, 4.096Mbit/s and 8.192Mbit/s, the interface
signals are all configured as inputs, except the receive serial data on RxSER and the multi frame sync pulse
provided by the framer. The Transmit Serial Clock for each channel is always an input clock with frequency of
2.048 MHz for all data rates so that it may be used as the timing reference for the transmit line rate. The
TxMSYNC signal is configured as the Transmit Input Clock with frequencies of 2.048 MHz, 4.096 MHz and
8.192 MHz respectively. It serves as the primary clock source for the High-speed Back-plane Interface.
Figure 68 shows how to connect the Transmit non-multiplexed high-speed Input Interface block to local
Terminal Equipment. Figure 69 shows how to connect the Receive non-multiplexed high-speed Output
Interface to local Terminal Equipment.
FIGURE 68. TRANSMIT
NON-MULTIPLEXED
HIGH-SPEED CONNECTION TO LOCAL TERMINAL EQUIPMENT USING MVIP
2.048MBIT , 4.096MBIT
/
S
/S
,
OR 8.192MBIT/S
TxMSYNC = 2.048/4.096/8.192MHz
TxSERCLK0
XRT86L30
Transmit
Payload
TxSER0
TxMSYNC0
TxSYNC0
Data Input
Interface
Chn 0
Terminal
Equipment
197
EXAR [ EXAR CORPORATION ]
