XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 224

• Manufacturer Part Number: XRT94L43IB-F
• Description: IC MAPPER SONET/SDH OC12 516BGA
• Manufacturer: Exar Corporation

Specifications of XRT94L43IB-F

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 2.5V, 3.3V
• Package / Case: 516-BBGA
• Mounting Type: Surface Mount
• Product: Mapper
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.2
STS-3/STM-1 TELECOM BUS INTERFACE - TRANSMIT DIRECTION
AA24
P
IN
#
TxSBFP_OUT
SSI_NEG
S
IGNAL
N
AME
I/O
O
S
CMOS
T
IGNAL
YPE
Transmit STS-3/STM-1 Telecom Bus Framing Pulse Output Pin:
This pin generates a pulse at an 8kHz rate. This signal is ultimately
derived from the Clock Synthesizer block (within the XRT94L43).
If the STS-3/STM-1 Telecom Bus Interface is configured to operate in
the "Re-Phase OFF" Mode, then the devices (or entities) that are
transmitting STS-3/STM-1 data (to the Transmit STS-3/STM-1 Tele-
com Bus Interface) must synchronize their STS-3/STM-1 frame
transmission to this output signal.
In the Re-Phase OFF Mode, each device or entity must align their
STS-3/STM-1 Frame transmission to this signal, in order to insure
that all four Transmit STS-3/STM-1 Telecom Bus Interfaces are pre-
sented with TOH data simultaneously.
Transmit STS-3/STM-1 Telecom Bus Framing Pulse Output Pin/
Slow-Speed Interface - Ingress - Negative Data I/O:
The exact function of this pin depends upon whether or not theSTS-
3/STM-1 Telecom Bus is enabled and whether the Slow-Speed Inter-
face is enabled.
Transmit STS-3/STM-1 Telecom Bus Framing Pulse Output Pin:
This pin generates a pulse at an 8kHz rate. This signal is ultimately
derived from the Clock Synthesizer block (within the XRT94L43).
If the user configures the STS-3/STM-1 Telecom Bus Interface to
operate in the "Re-Phase OFF" Mode, then the devices (or entities)
that is transmitting STS-3/STM-1 data (to the Transmit STS-3/STM-1
Telecom Bus Interface) must synchronize its STS-3/STM-1 frame
transmission to this output signal.
In the Re-Phase OFF Mode, each device or entity must align their
STS-3/STM-1 Frame transmission to this signal, in order to insure
that all four Transmit STS-3/STM-1 Telecom Bus Interfaces are pre-
sented with TOH data simultaneously.
SSI_NEG (Slow-Speed Interface - Ingress Port is enabled):
If the Slow-Speed Interface - Ingress (SSI) Port is enabled, then this
pin will function as either the SSI_NEG output pin or the SSI_NEG
input pin.
If the user configures the SSI port to operate in the "Insert" Mode,
then the SSI port will be configured to replace any "user-selected"
Ingress DS3/E3 or STS-1 data-stream (within the XRT94L43 device)
with the data that is applied to the SSI_POS and SSI_NEG input
pins. More specifically, in the "Insert" Mode, this pin will function as
the SSI_NEG input pin. In this case, the SSI port will sample and
latch the contents of this input pin (along with the SSI_POS input pin,
in a Dual-Rail Manner) upon the falling edge of the SSI_CLK input
clock signal.
If the user configures the SSI port to operate in the "Extract" Mode,
then the SSI port will output any "user-selected" Ingress DS3/E3 or
STS-1 signal (within the XRT94L43 device) via this output port.
More specifically, in the "Extract Mode" this pin will function as the
"SSI_NEG" output pin. In this case, the SSI port will output data via
this pin, along with the SSI_POS output pin (in a Dual-Rail Manner)
upon the rising edge of the SSI_CLK output signal.
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SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
D
ESCRIPTION
XRT94L43