DS2143 datasheet(17/44 Pages) DALLAS

17 / 44 page

DS2143/DS2143Q

17 of 44

SR1: STATUS REGISTER 1 (Address=06 Hex)

(MSB)

(LSB)

RSA1

RDMA

RSA0

SLIP

RUA1

RRA

RCL

RLOS

SYMBOL

POSITION

NAME AND DESCRIPTION

RSA1

SR1.7

Receive Signaling All 1s. Set when the contents of timeslot 16

contains less than 3 0s over 16 consecutive frames. This alarm is

not disabled in the CCS signaling mode.

RDMA

SR1.6

Receive Distant MF Alarm. Set when bit 6 of timeslot 16 in

frame 0 has been set for 2 consecutive multiframes. This alarm

is not disabled in the CCS signaling mode.

RSA0

SR1.5

Receive Signaling All 0s. Set when over a full MF, timeslot 16

contains all 0s.

SLIP

SR1.4

Elastic Store Slip Occurrence. Set when the elastic store has

either repeated or deleted a frame of data.

RUA1

SR1.3

Receive Unframed All 1s. Set when an unframed all 1s code is

received at RPOS and RNEG.

RRA

SR1.2

Receive Remote Alarm. Set when a remote alarm is received at

RPOS and RNEG.

RCL

SR1.1

Receive Carrier Loss. Set when 255 consecutive 0s have been

detected at RPOS and RNEG.

RLOS

SR1.0

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

to the receive E1 stream.

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