78P2343-IEL TERIDIAN [Teridian Semiconductor Corporation], 78P2343-IEL Datasheet - Page 15

• Manufacturer Part Number: 78P2343-IEL
• Description: 3-port E3/DS3/STS-1 LIU with Jitter Attenuator
• Manufacturer: TERIDIAN [Teridian Semiconductor Corporation]

PIN DESCRIPTION
CONTROL AND STATUS PINS
NAME
MSL0
MSL1
PORB
ENDECB
LBOx
LPBKx
INTRx
Page 15 of 37
10, 11
64, 63
PIN
5, 6
19
20
14
15
12
62
7
(continued)
TYPE
CID
CIT
CIT
CIT
CIT
CO
A

2005 Teridian Semiconductor Corporation
DESCRIPTION
Data-Rate Mode Selection:
NOTE: Pin state is latched-in on rising-edge of PORB signal. Pin
state is ignored after reset.
Jitter Attenuator Mode Selection:
NOTE: Pin state is latched-in on rising-edge of PORB signal. Pin
state is ignored after reset.
Chip Reset (active-low):
Forces hardware reset on device. See description on Internal Power-
on Reset for complete use of this pin.
ENDEC Enable (active-low):
Set high to disable internal ENDEC function. See description on
B3ZS/HDB3 ENDEC with Line Code Violation Detect for complete
use of this pin.
NOTE: Relevant only when the REGEN bit is ‘0’. Pin must be held
low when the REGEN bit is set.
Line Build-Out:
NOTE: LBO control relevant only when the REGEN bit is ‘0’. Pin
state sampled approximately once every 0.5ms.
Loopback Enable:
approximately once every 0.5ms.
Interrupt Flag:
This pin is normally high when the INPOL bit is ‘0’ (default), and
normally low when the INPOL bit is ‘1’. When an interrupt event
occurs (as defined in the Interrupt Control Register description), the
respective INTRx pin will change state.
NOTE: Relevant only when the REGEN bit is ‘0’. Pin state sampled
Low = E3 mode
High = DS3 mode
Float = STS-1 mode
Low = JAT in Receive path
High = JAT in Transmit path
Float = JAT is bypassed
Low = Used with 225ft or more of cable.
High = Used with less than 225ft of cable.
Float = Disable and power down transmitter. [TXEN=0; PDTX=1]
Low = Normal Operation
High = Local Loopback. Transmitter looped back to Receiver
Float = Remote Loopback. Receiver looped back to Transmitter
3-port E3/DS3/STS-1 LIU
with Jitter Attenuator
78P2343JAT
Rev 2.2