DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 116

• 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/Receive BOC Detector Change-of-State Event (RBOC). Set whenever the BOC detector sees a change of
state to a valid BOC. The setting of this bit prompts the user to read the RFDL register.
Bit 1/Receive FDL Match Event (RMTCH). Set whenever the contents of the RFDL register matches RFDLM1
or RFDLM2.
Bit 2/TFDL Register Empty Event (TFDLE). Set when the transmit FDL buffer (TFDL) empties.
Bit 3/RFDL Register Full Event (RFDLF). Set when the receive FDL buffer (RFDL) fills to capacity.
Bit 4/RFDL Abort Detect Event (RFDLAD). Set when eight consecutive 1s are received on the FDL.
Bit 5/BOC Clear Event (BOCC). Set when 30 FDL bits occur without an abort sequence.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Receive BOC Detector Change-of-State Event (RBOC)
Bit 1/Receive FDL Match Event (RMTCH)
Bit 2/TFDL Register Empty Event (TFDLE)
Bit 3/RFDL Register Full Event (RFDLF)
Bit 4/RFDL Abort Detect Event (RFDLAD)
Bit 5/BOC Clear Event (BOCC)
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
0 = interrupt masked
1 = interrupt enabled
—
7
0
—
7
0
—
6
0
—
SR8
Status Register 8
24h
IMR8
Interrupt Mask Register 8
25h
6
0
BOCC
5
0
BOCC
5
0
RFDLAD
RFDLAD
4
0
4
0
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RFDLF
RFDLF
3
0
3
0
TFDLE
TFDLE
2
0
2
0
RMTCH
RMTCH
1
0
1
0
RBOC
RBOC
0
0
0
0