DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 181

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

24.6 BERT Error Counter
Once BERT has achieved synchronization, this 24-bit counter increments for each data bit received in
error. Toggling the LC control bit in BC1 can clear this counter. This counter saturates when full and sets
the BECO status bit.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Error Counter Bits 0 to 7 (EC0 to EC7). EC0 is the LSB of the 24-bit counter.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Error Counter Bits 8 to 15 (EC8 to EC15)
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Error Counter Bits 16 to 23 (EC16 to EC23). EC0 is the MSB of the 24-bit counter.
EC15
EC23
EC7
7
0
7
0
7
0
EC14
EC22
EC6
BEC1
BERT Error-Count Register 1
E7h
BEC2
BERT Error-Count Register 2
E8h
BEC3
BERT Error-Count Register 3
E9h
6
0
6
0
6
0
EC13
EC21
EC5
5
0
5
0
5
0
EC12
EC20
EC4
4
0
4
0
4
0
181 of 237
EC11
EC19
EC3
0
0
0
3
3
3
EC10
EC18
EC2
2
0
2
0
2
0
EC17
EC9
EC1
1
0
1
0
1
0
EC16
EC0
EC8
0
0
0
0
0
0