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XRT94L43
121
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
AE21
STS3RxD_D_3_0
TxLEV_3
RxSBData_0
O
CMOS
Receive STS-3/STM-1 Telecom Bus - Channel 3 - Output Data Bus
Pin Number 0/TxLEV_3 (General Purpose) Output Pin:
The function of this output pin depends upon whether or not theSTS-3/
STM-1 Telecom Bus Interface, associated with Channel 3 is enabled.
If STS-3/STM-1 Telecom Bus (Channel 3) has been enabled - STS-3/
STM-1 Receive Telecom Bus - Output Data bus Pin Number 0:
STSRxD_D_3_0:
This output pin along with STS3RxD_D_3[7:1] function as the STS-3/
STM-1 Receive (Drop) Telecom Bus - Output Data Bus for Channel 3.
The STS-3/STM-1 Telecom Bus Interface will update the data via this
output upon the rising edge of STS3RxD_CLK_3.
NOTE: This input pin functions as the LSB (Least Significant Bit) of the
Receive (Drop) Telecom Bus for Channel 3.
If STS-3/STM-1 Telecom Bus (Channel 3) is disabled - TXLEV_3
(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 2 (TxLEV) within the Line Interface Drive Register associ-
ated with Channel 3 (Indirect Address = 0x4E, 0x80), (Direct Address =
0x4F80).
NOTE: For Product Legacy purposes, this pin is called TxLEV_3 because
one possible application is to tie this output pin to a TxLEV
(Transmit Line Build-Out Disable) 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.
AC19
STS3RxD_D_3_1
ENCODIS_3
RxSBData_1
O
CMOS
Receive STS-3/STM-1 Telecom Bus - Channel 3 - Output Data Bus
Pin Number 1/ENCODIS_3 (General Purpose) Output Pin:
The function of this output pin depends upon whether or not theSTS-3/
STM-1 Telecom Bus Interface, associated with Channel 3 is enabled.
If STS-3/STM-1 Telecom Bus (Channel 3) has been enabled - STS-3/
STM-1 Receive Telecom Bus - Output Data bus Pin Number 1:
STSRxD_D_3_1:
This output pin along with STS3RxD_D_3[7:2] and STS3RxD_D_3_0
function as the STS-3/STM-1 Receive (Drop) Telecom Bus - Output Data
Bus for Channel 3. The STS-3/STM-1 Telecom Bus Interface will update
the data via this output upon the rising edge of STS3RxD_CLK_3.
If STS-3/STM-1 Telecom Bus (Channel 3) is disabled - ENCODIS_3
(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 3 (ENCODIS) within the Line Interface Drive Register asso-
ciated with Channel 3 (Indirect Address = 0x4E, 0x80), (Direct Address =
0x4F80).
NOTE:
For Product Legacy purposes, this pin is called ENCODIS_3
because one possible application is to tie this output pin to an
ENCODIS (B3ZS/HDB3 Encoder Disable) 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.
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
PIN #SIGNAL NAME
I/O
SIGNAL
TYPE
DESCRIPTION