XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 34

• 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

SONET/SDH OVERHEAD INTERFACE - TRANSMIT DIRECTION
REV. 1.0.2
P
J6
IN
#
TxE1F1E2
S
IGNAL
N
AME
I/O
I
S
T
IGNAL
TTL
YPE
Transmit E1-F1-E2 Byte Input Port - Input Pin:
This input pin, along with the TxE1F1E2Enable and the TxTOHClk out-
put pins are used to insert a value for the E1, F1 and E2 bytes, into the
Transmit STS-12 TOH Processor Block. The Transmit STS-12 TOH
Processor block will accept this data and insert it into the E1, F1 and E2
byte fields, within the outbound STS-12 data-stream.
Whatever external circuitry that is interfaced to this input pin, the
TxE1F1E2Enable and the TxTOHClk pins is suppose to do the follow-
ing.
1. It should continuously monitor the state of the TxE1F1E2Enable input
pin.
2. Whenever the TxE1F1E2Enable input pin pulses "High", then the
external circuitry should place the next orderwire bit (to be inserted into
the Transmit STS-12 TOH Processor block) onto this input pin upon the
falling edge of TxTOHClk.
3. Any data that is placed on the TxE1F1E2 input pin, will be sampled
upon the rising edge of TxTOHClk.
N
OTE
: Tie this pin to GND if it is not going to be used.
28
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
D
ESCRIPTION
XRT94L43