DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 176

• 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): -

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 3/Repetitive Pattern Length Bit 3 (RPL0 to RPL3). RPL0 is the LSB and RPL3 is the MSB of a nibble
that describes how long the repetitive pattern is. The valid range is 17 (0000) to 32 (1111). These bits are ignored if
the receive BERT is programmed for a pseudorandom pattern. To create repetitive patterns fewer than 17 bits in
length, the user must set the length to an integer number of the desired length that is less than or equal to 32. For
example, to create a 6-bit pattern, the user can set the length to 18 (0001) or to 24 (0111) or to 30 (1101).
Bit 4/Single Bit-Error Insert (SBE). A low-to-high transition creates a single-bit error. Must be cleared and set
again for a subsequent bit error to be inserted.
Bits 5 to 7/Error Insert Bits 0 to 2 (EIB0 to EIB2). Automatically inserts bit errors at the prescribed rate into the
generated data pattern. Can be used for verifying error-detection features.
EIB2
Length
(bits)
0
0
0
0
1
1
1
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
EIB1
EIB2
0
0
1
1
0
0
1
1
7
0
RPL3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
EIB0
EIB1
0
1
0
1
0
1
0
1
BC2
BERT Control Register 2
E1h
6
0
RPL2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
No errors automatically inserted
10E-1
10E-2
10E-3
10E-4
10E-5
10E-6
10E-7
EIB0
RPL1
5
0
Error Rate Inserted
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
RPL0
SBE
4
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
176 of 237
RPL3
0
3
RPL2
2
0
RPL1
1
0
RPL0
0
0