XRT86L30 datasheet(73/279 Pages) EXAR

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XRT86L30

REV. 1.0.0

SINGLE T1/E1/J1 FRAMER/LIU COMBO

TxFr1544

R/W

If TxMUXEN = 0 and TxIMODE[1:0] = 00

0 = TxChn[4:0] will output the channel number as usual.

1 = TxChn[0]/TxSig will input signaling information and TxChn[1]/TxFrTD will

input

fractional channel data in 1.544 Mbit mode.

NOTE: This bit has no effect while either TxMUXEN = 1 or TxIMODE[1:0] =

00, TxChn[4:0] signals input TxSig and fractional data.

TxICLKINV

R/W

Clock Inversion

0 = Data transition occurs on rising edge of the transmit clock.

1 = Data transition occurs on falling edge of the transmit clock.

TxMUXEN

R/W

Mux Enable

0 = No channel multiplexing.

1 = Four channels are multiplexed in single serial stream.

TxIMODE[1]

R/W

Tx Intf Mode selection

This mode selection determines the interface speed.

When TxMUXEN = 0

00 = Transmit interface is taking data at a rate of 1.544Mbit/s.

01 = Transmit interface is taking data at a rate of 2.048Mbit/s.

10 = Transmit interface is taking data at a rate of 4.096Mbit/s.

11 = Transmit interface is taking data at a rate of 8.192Mbit/s.

When TxMUXEN = 1,

00 = Transmit interface is taking data at a rate of 12.352Mbit/s from channel 0

and bit-demultiplexing into 4 channels from to the LIU outputs on channels 0

through 3. The TxSYNC pulse remains “High” during the framing bit of each

DS-1 frame.

01 = Transmit interface is taking data at a rate of 16.384Mbit/s from channel 0

and bit-demultiplexing into 4 channels from to the LIU outputs on channels 0

through 3. The TxSYNC pulse remains “High” during the framing bit of each

DS-1 frame.

10 = Transmit interface is taking data at a rate of 16.384Mbit/s from channel 0

and byte-demultiplexing into 4 channels from to the LIU outputs on channels 0

through 3 (HMVIP Mode). The TxSYNC pulse remains “High” during the last

two bits of the previous DS-1 frame and the first two bits of the current DS-1

frame.

11 = Transmit interface is taking data at a rate of 16.384Mbit/s from channel 0

and byte-demultiplexing into 4 channels from to the LIU outputs on channels 0

through 3 (H.100 Mode). The TxSYNC pulse remains “High” during the last bit

of the previous DS-1 frame and the first bit of the current DS-1 frame.

NOTE: Channel 4 is de-multiplexed into the LIU outputs at channel 4 through

TxIMODE[0]

R/W

TABLE 46: TRANSMIT INTERFACE CONTROL REGISTER - T1 MODE

TRANSMIT INTERFACE CONTROL REGISTER (TICR)

HEX ADDRESS:0X0120

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

XRT86L30 Datasheet(PDF) 73 Page - Exar Corporation

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