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DS21Q55

Register Name:

IDR

 

 

 

 

 

 

 

Register Description:

Device Identification Register

 

 

 

 

 

Register Address:

0Fh

 

 

 

 

 

 

 

Bit #

7

6

5

4

3

2

1

0

 

Name

ID7

ID6

ID5

ID4

ID3

ID2

ID1

ID0

 

Default

1

0

1

1

X

X

X

X

 

Bits 0 to 3/Chip Revision Bits (ID0 to ID3). The lower four bits of the IDR are used to display the die revision of the chip. IDO is the LSB of a decimal code that represents the chip revision.

Bits 4 to 7/Device ID (ID4 to ID7). The upper four bits of the IDR are used to display the device ID.

Register Name:

SR2

 

 

 

 

 

 

Register Description:

Status Register 2

 

 

 

 

 

Register Address:

18h

 

 

 

 

 

 

Bit #

7

6

5

4

3

2

1

0

Name

RYELC

RUA1C

FRCLC

RLOSC

RYEL

RUA1

FRCL

RLOS

Default

0

0

0

0

0

0

0

0

Bit 0/Receive Loss of Sync Condition (RLOS). Set when the device is not synchronized to the received data stream.

Bit 1/Framer Receive Carrier Loss Condition (FRCL). Set when 255 (or 2048 if E1RCR2.0 = 1) E1 mode or 192 T1 mode consecutive zeros have been detected at RPOSI and RNEGI.

Bit 2/Receive Unframed All Ones (T1, Blue Alarm, E1, AIS) Condition (RUA1). Set when an unframed all ones code is received at RPOSI and RNEGI.

Bit 3/Receive Yellow Alarm Condition (RYEL). (T1 only) Set when a yellow alarm is received at RPOSI and RNEGI.

Bit 4/Receive Loss of Sync Clear Event (RLOSC). Set when the framer achieves synchronization; will remain set until read.

Bit 5/Framer Receive Carrier Loss Clear Event (FRCLC). Set when carrier loss condition at RPOSI and RNEGI is no longer detected.

Bit 6/Receive Unframed All Ones Clear Event (RUA1C). Set when the unframed all ones condition is no longer detected. Bit 7/Receive Yellow Alarm Clear Event (RYELC). (T1 only) Set when the yellow alarm condition is no longer detected.

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Please contact telecom.support@dalsemi.com or search http://www.maxim-ic.com for updated

information.

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Maxim DS21Q55 specifications Idr, SR2