XRT86VL34 datasheet(49/156 Pages) EXAR

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XRT86VL34

REV. V1.2.0

QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION

1-0

TxIMODE[1:0]

R/W

Transmit Interface Mode selection

This bit determines the transmit interface speed. The exact function of these

two bits depends on whether Multiplexed mode is enabled or disabled.

Table 29 and Table 30 shows the functions of these two bits for non-multi-

plexed and multiplexed modes.:

TABLE 28: TRANSMIT INTERFACE CONTROL REGISTER (TICR)

HEX ADDRESS:0Xn120

BIT

FUNCTION

TYPE

DEFAULT

DESCRIPTION-OPERATION

TABLE 29: TRANSMIT INTERFACE SPEED WHEN MULTIPLEXED MODE IS

DISABLED (TXMUXEN = 0)

TXIMODE[1:0]

TRANSMIT INTERFACE SPEED

1.544Mbit/s Base Rate Mode:

Transmit Backplane interface signals include:

TxSERCLK is an input or output clock at 1.544MHz

TxMSYNC is the superframe boundary at 3ms (ESF) or

1.5ms (SF)

TxSYNC is the single frame boundary at 125 us

TxSER is the base-rate data input

2.048Mbit/s (High-Speed MVIP Mode):

Transmit backplane interface signals include:

TxSERCLK is an input clock at 1.544MHz

TxMSYNC is the high speed input clock at 2.048MHz to

input high-speed data

TxSYNC can be configured as a single frame or super-

frame boundary, depending on the setting of bit 5 of reg-

ister 0xn109

TxSER is the high-speed data input

4.096Mbit/s High-Speed Mode:

Transmit Backplane interface signals include:

TxSERCLK is an input clock at 1.544MHz

TxMSYNC will become the high speed input clock at

4.096MHz to input high-speed data

TxSYNC can be configured as a single frame or super-

frame boundary, depending on the setting of bit 5 of reg-

ister 0xn109

TxSER is the high-speed data input

8.192Mbit/s High-Speed Mode:

Transmit Backplane interface signals include:

TxSERCLK is an input clock at 1.544MHz

TxMSYNC will become the high speed input clock at

8.192MHz to input high-speed data

TxSYNC can be configured as a single frame or super-

frame boundary, depending on the setting of bit 5 of reg-

ister 0xn109

TxSER is the high-speed data input

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