XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 163

• 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

XRT94L43
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
STS-12/STM-4 TELECOM BUS INTERFACE - RECEIVE DIRECTION
P
W1
U4
U3
V3
U2
V5
U1
V1
T2
T1
IN
#
RxD_DP
RxD_ALARM
RxD_D0
RxD_D1
RxD_D2
RxD_D3
RxD_D4
RxD_D5
RxD_D6
RxD_D7
S
IGNAL
N
AME
I/O
I
I
I
S
IGNAL
T
TTL
TTL
TTL
YPE
STS-12/STM-4 Receive Telecom Bus - Parity Input Pin:
This input pin can be configured to function as one of the following.
1. The EVEN or ODD parity value of the bits which are input via the
RXD_D[7:0] input pins.
2. The EVEN or ODD parity value of the bits which are being input via the
RXD_D[7:0] input and the states of the RXD_PL and RXD_C1J1 input
pins.
The Receive STS-12/STM-4 Telecom Bus Interface will use this pin to
compute and verify the parity within the incoming STS-12/STM-4 data-
stream.
N
Receive STS-12/STM-4 Telecom Bus - Alarm Indicator Input:
This input pin pulses "High" corresponding to any STS-1 signal that is car-
rying the AIS-P indicator.
More specifically, this input pin will be pulsed "High" coincident to when-
ever a byte, corresponding to given STS-1 signal (that is carrying the AIS-P
indicator) is being placed on the Receive STS-12/STM-4 Telecom Bus -
Data Bus Input pins (RxD_D[7:0]). This input pin should be pulled "Low" at
all other times.
N
Receive STS-12/STM-4 Receive Telecom Bus - Receive Input Data Bus
pins:
These 8 input pins function as the "Receive STS-12/STM4 Receive Tele-
com Bus" Receive Input data bus. All Incoming STS-12/STM-4 data is
sampled and latched (into the XRT94L43 via these input pins) upon the
rising edge of the RXA_CLK input pin.
N
OTES
OTES
OTES
1. Any one of these configuration selections can be made by writing
2. Tie this pin to GND if the STS-12/STM-4 Telecom Bus Interface is
1. If the RxD_ALARM input signal pulses "High" for any given STS-1
2. Tie this pin to GND if the STS-12/STM-4 Telecom Bus Interface
1. 1.The user must insure that the MSB (Most Significant bit) of each
2. The user must also insure that the LSB (Least Significant bit) of
3. The user should tie these pins to GND if the STS-12/STM-4
:
:
:
the appropriate value into the Telecom Bus Control register
(Indirect Address = 0x00, 0x37, direct Address = 0x0137.
configured to operate in the Re-Phase ON Mode or is disabled.
signal (within the incoming STS-12), then the XRT94L43 will
automatically declare the AIS-P defect for that particular STS-1
channel.
has been configured to operate in the Re-Phase ON Mode or is
disabled.
incoming byte is input to the RXD_D7 input pin.
each incoming byte is input to the RXD_D0 input pin.
Telecom Bus is not enabled.
157
D
ESCRIPTION
REV. 1.0.2