DJLXT380LE.B4 Cortina Systems Inc, DJLXT380LE.B4 Datasheet - Page 37

• Manufacturer Part Number: DJLXT380LE.B4
• Manufacturer: Cortina Systems Inc

Specifications of DJLXT380LE.B4

• Lead Free Status / RoHS Status: Not Compliant

4.0
4.1
4.2
Datasheet
Figure 14. LXT380 JTAG Architecture
JTAG Boundary Scan
Overview
The LXT380 supports IEEE 1149.1 compliant JTAG boundary scan. Boundary scan allows easy
access to the interface pins for board testing purposes.
In addition to the traditional IEE1149.1 digital boundary scan capabilities, the LXT380 also
includes analog test port capabilities. This feature provides access to the TIP and RING signals in
each channel (transmit and receive). This way, the signal path integrity across the primary winding
of each coupling transformer can be tested.
Architecture
Figure 14
The LXT380 JTAG architecture includes a TAP Test Access Port Controller, data registers and an
instruction register. The following paragraphs describe these blocks in detail.
TRST
TMS
TCK
TDI
represents the LXT380 basic JTAG architecture.
Controller
TAP
Device Identification Register
Boundry Scan Data Register
Analog Port Scan Register
Instruction Register
Bypass Register
BSR
ASR
BYR
IDR
IR
Octal E1 G.703 Transceiver — LXT380
MUX
TDO
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