XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 377

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.1
Once again, configuration of the XRT84L38 framer to replace raw E1 PCM data with the above-mentioned
coding schemes are controlled by the Transmit Data Conditioning Select [3:0] bits of the Transmit Channel
Control Register (TCCR) of each DS0 channel.
Finally, the XRT84L38 framer can configure any one or ones of the thirty two DS0 channels to be D or E
channels. D channel is used primarily for data link applications. E channel is used primarily for signaling for
circuit switching with multiple access configurations.
The Transmit Data Conditioning Select [3:0] bits of the Transmit Channel Control Register (TCCR) of each
channel determine whether that particular channel is configured as D or E channel.
The table below illustrates configurations of the Transmit Data Conditioning Select [3:0] bits of the Transmit
Channel Control Register (TCCR).
TRANSMIT CHANNEL CONTROL REGISTER (TCCR) (INDIRECT ADDRESS = 0XN2H, 0X00H - 0X1FH)
N
UMBER
B
3-0
IT
Conditioning
B
Transmit
IT
Select
N
AME
B
IT
R/W
T
YPE
0000 - The input E1 PCM data of this DS0 channel is unchanged.
0001 - All 8 bits of the input E1 PCM data of this DS0 channel are inverted.
0010 - The even bits of the input E1 PCM data of this DS0 channel are
inverted.
0011 - The odd bits of the input E1 PCM data of this DS0 channel are
inverted.
0100 - The input E1 PCM data of this DS0 channel are replaced by the
octet stored in User IDLE Code Register (UCR).
0101 - The input E1 PCM data of this DS0 channel are replaced by BUSY
code (0x7F).
0110 - The input E1 PCM data of this DS0 channel are replaced by
VACANT code (0xFF).
0111 - The input E1 PCM data of this DS0 channel are replaced by
BUSY_TS code (111xxxxx).
1000 - The input E1 PCM data of this DS0 channel are replaced by MUX-
Out-Of-Frame (MOOF) code with value 0x1A.
1001 - The input E1 PCM data of this DS0 channel are replaced by the A-
law digital milliwatt pattern.
1010 - The input E1 PCM data of this DS0 channel are replaced by the u-
law digital milliwatt pattern.
1011 - The MSB bit of the input E1 PCM data of this DS0 channel is
inverted.
1100 - All bits of the input E1 PCM data of this DS0 channel except MSB
bit are inverted.
1101 - The input E1 PCM data of this DS0 channel are replaced by PRBS
pattern created by the internal PRBS Generator of XRT84L38 framer.
1110 - The input E1 PCM data of this DS0 channel is unchanged.
1111 - This channel is configured as D or E timeslot.
357
B
IT
D
ESCRIPTION
OCTAL T1/E1/J1 FRAMER
XRT84L38