DS3174+ Maxim Integrated Products, DS3174+ Datasheet - Page 70
DS3174+
Manufacturer Part Number
DS3174+
Description
IC TXRX DS3/E3 QUAD 400-BGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3171N.pdf
(234 pages)
Specifications of DS3174+
Function
Single-Chip Transceiver
Interface
DS3, E3
Number Of Circuits
4
Voltage - Supply
3.135 V ~ 3.465 V
Current - Supply
725mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
400-BGA
Includes
DS3 Framers, E3 Framers, HDLC Controller, On-Chip BERTs
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
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Figure 10-10
paths available.
Figure 10-10. Loopback Modes
10.5.1.1 Analog Loopback (ALB)
Analog loopback is enabled by setting PORT.CR4.LBM[2:0] = 001. Analog loopback mode will not be enabled
when the port is configured for loop-timed mode (set via the PORT.CR3.LOOPT bit).
The analog loopback is a loopback as close to the pins as possible. When both the TX and RX LIU are enabled, it
loops back TXPn and TXNn to RXPn and RXNn, respectively. If the transmit signals on TXPn and TXNn are not
terminated properly, this loopback path may have data errors or loss of signal. When the LIU is not enabled, it
loops back TLCLKn,TPOSn / TDATn,TNEGn to RLCLKn, RPOSn / RDATn , RNEGn.
Figure 10-11. ALB Mux
Clock Rate
Receive
Transmit
DS3/E3
DS3/E3
TXP
TXN
Adapter
RXP
RXN
LIU
LIU
highlights where each loopback mode is located and gives an overall view of the various loopback
Decoder
Encoder
B3ZS/
HDB3
B3ZS/
HDB3
LIU
LIU
TX
RX
TUA1
TAIS
IEEE P1149.1
JTAG Test
Access Port
FEAC
DS3 / E3
Framer
DS3 / E3
Receive
Transmit
Formatter
Buffer
Trace
Trail
HDLC
70
GEN
UA1
RX BERT
TX BERT
Microprocessor
Interface
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