XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 92

• 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

STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
REV. 1.0.2
P
D23
IN
#
STS3RxD_CLK_1
RxSBClkLLOOP_1
S
IGNAL
N
AME
I/O
O
S
CMOS Receive STS-3/STM-1 Telecom Bus Clock Output - Channel 1;
T
IGNAL
YPE
LLOOP_1 (General Purpose) Output Pin:
The function of this input pin depends upon whether or not theSTS-3/
STM-1 Telecom Bus Interface associated with Channel 1 is enabled.
If STS-3/STM-1 Telecom Bus (Channel 1) has been enabled - STS-3/
STM-1 Receive Telecom Bus Clock Output - Channel 1;
STS3RxD_CLK_1:
All signals, which is output via the Receive Telecom Bus - Channel 1 is
clocked out upon the rising edge of this clock signal. This includes the fol-
lowing signals.
•
•
•
•
•
This clock signal will operate at 19.44MHz.
If STS-3/STM-1 Telecom Bus (Channel 1) is disabled - LLOOP_1
(General Purpose) Output Pin:
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 0 (LLOOP) within the Line Interface Drive Register associ-
ated with Channel 1 (Indirect Address = 0x2E, 0x80), (Direct Address =
0x2F80).
N
OTE
STS3RxD_D_1[7:0]
STS3RxD_ALARM_1
STS3RxD_DP_1
STS3RxD_PL_1
STS3RxD_C1J1_1
:
because one possible application is to tie this output pin to an
LLOOP (Local Loop-back) input pin from one of Exar's
XRT73L0X/XRT75L0X DS3/E3/STS-1 LIU devices. However,
this output pin, and the corresponding register bit can be used for
any purpose.
For Product Legacy purposes, this pin is called LLOOP_1
86
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
D
ESCRIPTION
XRT94L43