DS21Q50L+ Maxim Integrated Products, DS21Q50L+ Datasheet - Page 50

• Manufacturer Part Number: DS21Q50L+
• Description: IC TXRX E1 QUAD 100-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q50L+

• Function: Transceiver
• Interface: E1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 230mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: *
• Includes: AIS Alarms Detector and Generator, Loopback Functions, PRBS Generator / Detector, Remote Detector and Generator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

14.
On the receiver, the RAF and RNAF registers always report the data as it is received in the additional (Sa)
and international (Si) bit locations. The RAF and RNAF registers are updated with the setting of the
receive align frame bit in status register 2 (SR2.6). The host can use the SR2.6 bit to know when to read
the RAF and RNAF registers. It has 250ms to retrieve the data before it is lost.
On the transmitter, data is sampled from the TAF and TNAF registers with the setting of the transmit
align frame bit in status register 2 (SR2.3). The host can use the SR2.3 bit to know when to update the
TAF and TNAF registers. It has 250µs to update the data or else the old data is retransmitted. Data in the
Si bit position is overwritten if either the framer is programmed (1) to source the Si bits from the TSER
pin, (2) in the CRC4 mode, or (3) to have automatic E-bit insertion enabled. Data in the Sa-bit position is
overwritten if any of the TCR.3 to TCR.7 bits is set to 1. Please see the register descriptions for TCR for
more details.
Register Name:
Register Description:
Register Address:
Bit
Name
NAME
Si
0
0
1
1
0
1
1
ADDITIONAL (Sa) AND INTERNATIONAL (Si) BIT OPERATION
Si
7
BIT
7
5
4
3
2
1
0
6
International Bit
6
0
Frame Alignment Signal Bit
Frame Alignment Signal Bit
Frame Alignment Signal Bit
Frame Alignment Signal Bit
Frame Alignment Signal Bit
Frame Alignment Signal Bit
Frame Alignment Signal Bit
RAF
Receive Align Frame Register
28 Hex
5
0
4
1
FUNCTION
50 of 87
3
1
2
0
1
1
0
1