xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 66

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

XRT94L33
Rev.1.2.0.
AE15
B21
TXHDLCDAT_7_1
TXHDLCDAT_0_2
STS1TXA_D7_1
STS1TXA_D0_2
TXGFCMSB_2
TXAISEN_1
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
I/O
I
TTL/CMOS
TTL
Transmit STS-1 Telecom Bus – Channel 1 – Input Data
Bus pin number 7:
The exact function of this pin depends upon whether the STS-
1 Telecom Bus Interface, associated with Channel 1 is
enabled or not.
If STS-1 Telecom Bus (Channel 1) has been enabled –
STS-1 Transmit Telecom Bus – Input Data Bus pin number 7:
STS1TXA_D7_1:
This input pin along with “STS1TXA_D_1[6:0]” function as the
“STS-1 Transmit (Add) Telecom Bus – Input Data Bus for
Channel 1. The STS-1 Telecom Bus interface will sample and
latch this pin upon the falling edge of “STS1TXA_CK_1”.
Note:
TXHDLCDAT_7_1 (Transmit HDLC block data – Channel 1
– Input data pin 7)
TXAISEN_1 (Transmit AIS Enable – Channel 1)
Transmit STS-1 Telecom Bus – Channel 2 – Input Data
Bus pin number 0:
The exact function of this pin depends upon whether the STS-
1 Telecom Bus Interface, associated with Channel 2 is
enabled or not.
If STS-1 Telecom Bus (Channel 2) has been enabled –
STS-1 Transmit Telecom Bus – Input Data Bus pin number 0:
This input pin along with “STS1TXA_D_2[7:1]” function as the
“STS-1 Transmit (Add) Telecom Bus – Input Data Bus for
Channel 2.
(Least Significant Bit) input pin on the Transmit (Add) Telecom
Bus – Input Data Bus. The STS-1 Telecom Bus interface will
sample and latch this pin upon the falling edge of
“STS1TXA_CK_2”.
The LSB of any byte, which is being input into the “STS-1
Transmit Telecom Bus – Data Bus (for Channel 2) should be
input via this pin.
TXHDLCDAT_0_2 (Transmit HDLC block data – Channel 2
– Input data pin 0)
TXGFCMSB_2 (Transmit GFC MSB Indicator – Channel 2)
66
Significant Bit) of the Transmit (Add) Telecom Bus,
for Channel 1.
This input pin functions as the MSB (Most
This particular input pin functions as the LSB
xr