XRT94L43
40
REV. 1.0.2
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
B22
STS3TxA_DP_0
ING_LCV_IN_4
ING_RxNEG_IN_4
TxSTS1PL_4
I/O
TTL/
CMOS
Transmit STS-3/STM-1 Telecom Bus - Parity Input Pin - Channel
0; DS3/E3 Framer BlockLCV/RxNEG Input Pin - Channel 4:
The function of this pin depends upon whether or not theSTS-3/STM-
1 Telecom Bus Interface for Telecom Bus Channel 0 has been
enabled.
If STS-3/STM-1 Telecom Bus Telecom Bus (Channel 0) has been
enabled -Transmit STS-3/STM-1 Telecom Bus Interface - 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 ST3TXA_D_0[7:0] input pins.
2. The EVEN or ODD parity value of the bits which are being
input via the STS3TXA_D_0[7:0] input and the states of the
STS3TXA_PL_0 and STS3TXA_C1J1_0 input pins.
NOTE: Any one of these configuration selections can be made by
writing the appropriate value into the Interface Control
Register - Byte 0 register (Indirect Address = 0x00, 0x3B),
(Direct Address = 0x013B).
If STS-3/STM-1 Telecom Bus (Telecom Bus Channel 0) is dis-
abled - DS3/E3 Framer Block LCV/RxNEG Input - Channel 4):
If the STS-3/STM-1 Telecom Bus (Channel 0) is disabled and if the
DS3/E3 Framer block (associated with Channel 4) is enabled then
this pin will function as either an LCV or an RxNEG input pin.
If Channel 4 is configured to operate in the Single- Rail Mode,
and if the Primary Frame Synchronizer block is configured to
operate in the Ingress Path - ING_LCV_IN_4 Input pin:
If the Primary Frame Synchronizer Block (associated with Channel 4)
is configured to operate in the Ingress Path, and if Channel 4 is con-
figured to operate in the Single-Rail Mode, then this input pin will
function as the "LCV" (Line Code Violation) input pin. In this case,
the user should connect this particular input pin to the "LCV" output
pin of the corresponding DS3/E3/STS-1 LIU Channel.
If Channel 8 is configured to operate in the Dual-Rail Mode, and
if the Primary Frame Synchronizer block is configured to oper-
ate in the Ingress Path - ING_RxNEG_IN_4:
If the Primary Frame Synchronizer block (associated with Channel 4)
is configured to operate in the Ingress Path, and if Channel 4 is con-
figured to operate in the Dual-Rail Mode, then this input pin will func-
tion as the "RxNEG" (Negative Polarity Data) input pin. In this case,
the user should connect this particular input to the "RxNEG" output
pin of the corresponding DS3/E3/STS-1 LIU Channel.
NOTE: This pin is inactive if the Primary Frame Synchronizer block
(associated with Channel 4) is NOT configured to operate in
the Ingress Path.
STS-3/STM-1 TELECOM BUS INTERFACE - TRANSMIT DIRECTION
PIN #SIGNAL NAME
I/O
SIGNAL
TYPE
DESCRIPTION