CS61318-IP 데이터 시트보기 (PDF) - Cirrus Logic

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CS61318-IP

E1 Line Interface Unit

Cirrus Logic 

CS61318

2.11.1 Control Register 1: Address 0x10

7 (MSB)

TAOS

6

LLOOP

5

RLOOP

4

Reserved

Set to “0”

3

Reserved

Set to “0”

2

HDB3

1

NLOOP

0 (LSB)

LOS

TAOS

LLOOP

RLOOP

BITS 4:3

HDB3

NLOOP

LOS

Transmit All Ones Select

When TAOS = 1, all ones are transmitted at the TCLK frequency

Local Loopback

When LLOOP = 1, data input at TPOS, TNEG (TDATA) is internally looped back and output on

RPOS, RNEG (RDATA). TCLK is routed to RCLK, through the jitter attenuator, if activated.

Remote Loopback

When RLOOP = 1, clock and data recovered by the receiver are sent back through the transmit

path and retransmitted. The clock and data are routed through the jitter attenuator, if activated.

Reserved - Set Bits 3 & 4 to “0” for proper operation.

Setting HDB3 to “1” enables HDB3 encoding and decoding.

Network Loopback

NLOOP = 1 when a network loopback code has been detected on the received signal.

An interrupt will occur when NLOOP changes state unless a “1” is written to NLOOP disabling

the interrupt.

Loss Of Signal

LOS = 1 when the loss of signal criteria have been met (See Receiver Loss of Signal).

LOS = 0 when a valid signal is being received.

Writing a “1” to LOS disables interrupts due to LOS and the LOS Change indication in bits 5

and 6.

DS441PP2

13

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