XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 232

• 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 - RECEIVE DIRECTION
P
A21
IN
#
STS3RxD_PL_0
TAOS_0
S
IGNAL
N
AME
I/O
O
S
CMOS STS-3/STM-1 Receive (Drop) Telecom Bus - Payload Indi-
T
IGNAL
YPE
cator Output Signal - Channel 0/TAOS_0 (General Purpose)
output Pin - Channel 0:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface block associated with
Channel 0 has been enabled or disabled.
If the STS-3/STM-1 Telecom Bus Interface (associated with
Channel 0) is enabled - STS-3/STS-1 Receive (Drop) Tele-
com Bus - Payload Indicator Output - STS3RxD_PL_0:
This output pin indicates whether or not Transport Overhead
bytes are being output via the STS3RXD_D_0[7:0] output pins.
This output pin is pulled "Low" for the duration that the STS-3/
STM-1 Receive Telecom Bus is transmitting a Transport Over-
head byte via the STS3RXD_D_0[7:0] output pins.
Conversely, this output pin is pulled "High" for the duration that
the STS-3/STM-1 Receive Telecom Bus is transmitting some-
thing other than a Transport Overhead byte via the
STS3RXD_D_0[7:0] output pins.
If the STS-3/STM-1 Telecom Bus Interface (associated with
Channel 0) is disabled - TAOS_0 (General Purpose) output
Pin - Channel 0:
This output pin can be used as a general purpose output pin.
The state of this output pin can be controlled by writing the
appropriate value into Bit 4 (TAOS) within the Line Interface
Drive Register associated with Channel 0 (Indirect Address =
0x1E, 0x80), (Direct Address = 0x1F80).
N
226
OTE
: For Product Legacy purposes, this pin is called TAOS_0
because one possible application is to tie this output
pin to an TAOS (Transmit All Ones) input pin from one
of Exar's XRT73L0X/XRT75L0X DS3/E3/STS-1 LIU
devices.
corresponding register bit can be used for any
purpose.
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
However,
D
ESCRIPTION
this
output
pin,
XRT94L43
and
the