xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 80
xrt94l33
Manufacturer Part Number
xrt94l33
Description
Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
Manufacturer
Exar Corporation
Datasheet
1.XRT94L33.pdf
(465 pages)
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XRT94L33
Rev.1.2.0.
E25
STS1RXD_C1J1_1
TXDS3LINECLK_1
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
O
CMOS
STS-1 Receive Telecom Bus - C1/J1 Byte Phase Indicator
Output Signal – Channel 1:
The exact function of this output pin depends upon whether
the STS-1 Telecom Bus Interface for Channel 1 has been
enabled or not.
If STS-1 Telecom Bus (Channel 1) has been enabled –
STS-1 Receive Telecom Bus – C1/J1 Byte Phase Indicator
Output Signal:
This output pin pulses “high” under the following two
conditions.
Whenever
“STS1RXD_D_1[7:0]” output, and
Whenever
“STS1RXD_D_1[7:0]” output.
Notes:
1.
2.
TXDS3LINECLK_1 (Transmit DS3/E3/STS-1 line clock to
LIU – Channel 1)
80
The STS-1 Receive (Drop) Telecom Bus (associated with
Channel 1) will indicate that it is transmitting the C1 byte
(via the STS1RXD_D_1[7:0] output pins), by pulsing this
output pin “HIGH” (for one period of “STS1RXD_CK_1”)
and keeping the “STS1RXD_PL_1” output pin pulled
“LOW.
The STS-1 Receive (Drop) Telecom Bus (associated with
Channel 1) will indicate that it is transmitting the J1 byte
(via the STS1RXD_D_1[7:0] output pins), by pulsing this
output pin “HIGH” (for one period of “STS1RXD_CK_1”)
while the “STS1TXD_PL_1” output pin is pulled “HIGH”.
the
the
C1
J1
byte
byte
is
is
being
being
xr
output
output
via
via
the
the
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