DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 57

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Transmit Loop Code Enable (TLOOP). See Programmable In-Band Loop Codes Generation and Detection for details.
Bit 1/Pulse Density Enforcer Enable (PDE). The framer always examines both the transmit and receive data streams for
violations of the following rules, which are required by ANSI T1.403: no more than 15 consecutive zeros and at least N ones
in each and every time window of 8 x (N +1) bits where N = 1 through 23. Violations for the transmit and receive data streams
are reported in the INFO1.6 and INFO1.7 bits respectively. When this bit is set to one, the device will force the transmitted
stream to meet this requirement no matter the content of the transmitted stream. When running B8ZS, this bit should be set to
zero since B8ZS encoded data streams cannot violate the pulse density requirements.
Bit 2/Transmit Frame Mode Select (TFM).
Bit 3/Transmit AIS-CI Enable (TAIS-CI). Setting this bit and the TBL bit (T1TCR1.1) causes the AIS-CI code to be
transmitted at TPOSO and TNEGO, as defined in ANSI T1.403.
Bit 4/Transmit RAI-CI Enable (TRAI-CI). Setting this bit causes the ESF RAI-CI code to be transmitted in the FDL bit
position.
Bit 5/Unused, must be set to zero for proper operation.
Bit 6/Unused, must be set to zero for proper operation.
Bit 7/Unused, must be set to zero for proper operation.
0 = transmit data normally
1 = replace normal transmitted data with repeating code as defined in registers TCD1 and TCD2
0 = disable transmit pulse density enforcer
1 = enable transmit pulse density enforcer
0 = D4 framing mode
1 = ESF framing mode
0 = do not transmit the AIS-CI code
1 = transmit the AIS-CI code (T1TCR1.1 must also be set = 1)
0 = do not transmit the ESF RAI-CI code
1 = transmit the ESF RAI-CI code
—
7
0
—
T1CCR1
T1 Common Control Register 1
07h
6
0
—
5
0
TRAI-CI
4
0
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TAIS-CI
3
0
TFM
2
0
PDE
1
0
TLOOP
0
0