DS2152 datasheet(34/94 Pages) DALLAS

34 / 94 page

DS2152

34 of 93

SR1: STATUS REGISTER 1 (Address=20 Hex)

(MSB)

(LSB)

LUP

LDN

LOTC

RSLIP

RBL

RYEL

LRCL

RLOS

SYMBOL

POSITION

NAME AND DESCRIPTION

LUP

SR1.7

Loop Up Code Detected. Set when the loop up code as defined

in the RUPCD register is being received. See Section 12 for

details.

LDN

SR1.6

Loop Down Code Detected. Set when the loop down code as

defined in the RDNCD register is being received. See Section 12

for details.

LOTC

SR1.5

Loss of Transmit Clock. Set when the TCLK pin has not

transitioned for one channel time (or 5.2 us). Will force the

RLOS/LOTC pin high if enabled via CCR1.6. Also will force

transmit side formatter to switch to RCLKO if so enabled via

TCR1.7.

RSLIP

SR1.4

Receive Elastic Store Slip Occurrence. Set when the receive

elastic store has either repeated or deleted a frame.

RBL

SR1.3

Receive Blue Alarm. Set when an unframed all 1s code is

received at RPOSI and RNEGI.

RYEL

SR1.2

Receive Yellow Alarm. Set when a yellow alarm is received at

RPOSI and RNEGI.

LRCL

SR1.1

Line

Interface

Receive

Carrier

Loss.

Set

when

192

consecutive 0s have been detected at RTIP and RRING. See

Table 4-2.

RLOS

SR1.0

Receive Loss of Sync. Set when the device is not synchronized

to the receive T1 stream.

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