XRT94L33IB datasheet(91/862 Pages) EXAR

91 / 862 page

XRT94L33

Rev 2

22 ...0

00 ...0

33 ---C

C H

H A

A N

N N

N E

E L

L D

D S

S 3

33 ///E

E 3

33 ///S

S T

T S

S -

-- 1

11 T

T O

O S

S T

T S

S -

-- 3

33 ///S

S T

T M

M -

-- 1

11 M

M A

A P

P P

P E

E R

R –

–– A

A T

T M

M R

R E

E G

G IIIS

S T

T E

E R

R S

Table 34: Interface Control Register – STS-1/STM-0 Telecom Bus FIFO Status Register (Address

Location = 0x013D)

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

Unused

STS-1

Telecom

Bus Tx

Overrun

Bus 2

STS-1

Telecom

Bus Tx

Underrun

Bus 2

STS-1

Telecom

Bus Tx

Overrun

Bus 1

STS-1

Telecom

Bus Tx

Underrun

Bus 1

STS-1

Telecom

Bus Tx

Overrun

Bus 0

STS-1

Telecom

Bus Tx

Underrun

Bus 0

R/O

BIT NUMBER

NAME

TYPE

DESCRIPTION

Unused

R/O

Unused

R/O

STS-1

Telecom Bus –

TxFIFO

Overrun # 2

R/O

STS-1 Telecom Bus – Transmit FIFO Overrun Indicator – Channel 2:

This READ-ONLY bit-field indicates whether or not “STS-1 Telecom Bus –

Channel 2” is currently declaring a “Transmit FIFO Overrun” condition.

0 – Indicates that “STS-1 Telecom Bus – Channel 2” is NOT declaring a

“Transmit FIFO Overrun” condition.

1 – Indicates that “STS-1 Telecom Bus – Channel 2” is currently declaring a

“Transmit FIFO Overrun” condition.

Note:

This bit-field is only active if “STS-1 Telecom Bus – Channel 2” has

been enabled.

STS-1

Telecom Bus –

TxFIFO

Underrun # 2

R/O

STS-1 Telecom Bus – Transmit FIFO Underrun Indicator – Channel 2:

This READ-ONLY bit-field indicates whether or not “STS-1 Telecom Bus –

Channel 3” is currently declaring a “Transmit FIFO Underrun” condition.

0 – Indicates that “STS-1 Telecom Bus – Channel 2” is NOT declaring a

“Transmit FIFO Underrun” condition.

1 – Indicates that “STS-1 Telecom Bus – Channel 2” is currently declaring a

“Transmit FIFO Underrun” condition.

Note:

This bit-field is only active if “STS-1 Telecom Bus – Channel 2” has

been enabled.

STS-1

Telecom Bus –

TxFIFO

Overrun # 1

R/O

STS-1 Telecom Bus – Transmit FIFO Overrun Indicator – Channel 1:

This READ-ONLY bit-field indicates whether or not “STS-1 Telecom Bus –

Channel 1” is currently declaring a “Transmit FIFO Overrun” condition.

0 – Indicates that “STS-1 Telecom Bus – Channel 1” is NOT declaring a

“Transmit FIFO Overrun” condition.

1 – Indicates that “STS-1 Telecom Bus – Channel 1” is currently declaring a

“Transmit FIFO Overrun” condition.

Note:

This bit-field is only active if “STS-1 Telecom Bus – Channel 1” has

been enabled.

STS-1

Telecom Bus –

TxFIFO

Underrun # 1

R/O

STS-1 Telecom Bus – Transmit FIFO Underrun Indicator – Channel 1:

This READ-ONLY bit-field indicates whether or not “STS-1 Telecom Bus –

Channel 1” is currently declaring a “Transmit FIFO Underrun” condition.

0 – Indicates that “STS-1 Telecom Bus – Channel 1” is NOT declaring a

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