DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 115

• 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
Bit 0/Send BOC (SBOC). Set = 1 to transmit the BOC code placed in bits 0 to 5 of the TFDL register.
Bits 1 and 2/Receive BOC Filter Bits (RBF0, RBF1). The BOC filter sets the number of consecutive patterns that
must be received without error prior to an indication of a valid message.
Bit 3/Receive BOC Reset (RBR). A 0-to-1 transition resets the BOC circuitry. Must be cleared and set again for a
subsequent reset.
Bit 4/Receive BOC Enable (RBOCE). Enables the receive BOC function. The RFDL register reports the received
BOC code and two information bits when this bit is set.
Bits 5 to 7/Unused, must be set to 0 for proper operation
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
RFDL register bit definitions when BOCC.4 = 1:
Bit 0/BOC Bit 0 (RBOC0)
Bit 1/BOC Bit 1 (RBOC1)
Bit 2/BOC Bit 2 (RBOC2)
Bit 3/BOC Bit 3 (RBOC3)
Bit 4/BOC Bit 4 (RBOC4)
Bit 5/BOC Bit 5 (RBOC5)
Bits 6, 7/This bit position is unused when BOCC.4 = 1.
RBF1
0
0
1
1
0 = receive BOC function disabled
1 = receive BOC function enabled; the RFDL register reports BOC messages and information
RBF0
—
0
1
0
1
—
7
0
7
0
—
—
BOCC
BOC Control Register
37h
Valid Sequence Identification
RFDL
Receive FDL Register
C0h
6
0
6
0
Consecutive BOC Codes for
RBOC5
—
5
0
5
0
None
3
5
7
RBOCE
RBOC4
4
0
4
0
115 of 237
RBOC3
RBR
0
0
3
3
RBOC2
RBF1
2
0
2
0
RBOC1
RBF0
1
0
1
0
RBOC0
SBOC
0
0
0
0