xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 83

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
AG9
A19
STS1RXD_ALARM_0
STS1RXD_DP_2
TXDS3NEG_0/
TXDS3POS_2
O
O
CMOS
CMOS
STS-1 Receive (Drop) Telecom Bus – Parity Output pin –
Channel 2:
The exact function of this output pin depends upon whether
the STS-1 Telecom Bus Interface for Channel 2 has been
enabled or not.
If STS-1 Telecom Bus (Channel 2) has been enabled –
STS-1 Receive Telecom Bus – Parity Output pin:
This output pin can be configured to function as one of the
following.
The EVEN or ODD parity value of the bits output via the
“STS1RXD_D_2[7:0]” output pins.
The EVEN or ODD parity value of the bits being output via the
“STS1RXD_D_2[7:0]” output pins and the states of the
“STS1RXD_PL_2” and “STS1RXD_C1J1_2” output pins.
This output pin will ultimately be used (by “drop-side” circuitry)
to verify the verify of the data which is output via the “STS-1
Telecom Bus Interface associated with Channel 2.
Note:
TXDS3POS_2 (Transmit DS3/E3/STS-1 line data positive to
LIU– Channel 2)
STS-1 Receive (Drop) Telecom Bus – Alarm Indicator
Output signal – Channel 0:
The exact function of this output pin depends upon whether
the STS-1 Telecom Bus Interface for Channel 0 has been
enabled or not.
If STS-1 Telecom Bus (Channel 0) has been enabled –
STS-1 Receive Telecom Bus – Alarm Indicator Output signal:
This output pin pulses “high”, coincident with any STS-1 signal
(that is being output via the “STS1RXD_D_0[7:0]” output pins)
that is carrying an AIS-P indicator.
This output pin is “low” for all other conditions.
TXDS3NEG_0 (Transmit DS3/E3 line data negative to LIU –
Channel 0)
83
The user can make any one of these configuration
selections by writing the appropriate value into the
“Telecom Bus Control” Register (Address Location
= 0x0139).
XRT94L33
Rev.1.2.0.