DJLXT380LE.B4 Cortina Systems Inc, DJLXT380LE.B4 Datasheet - Page 46
DJLXT380LE.B4
Manufacturer Part Number
DJLXT380LE.B4
Description
Manufacturer
Cortina Systems Inc
Datasheet
1.DJLXT380LE.B4.pdf
(68 pages)
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LXT380 — Octal E1 G.703 Transceiver
4.4.5
46
Figure 16. Analog Test Port Application
The Analog Test Port can be used to verify continuity across the coupling transformer’s primary
winding. By applying a stimulus to the AT1 input, a known voltage will appear at AT2 for a given
load. This, in effect, tests the continuity of a receive or transmit interface. See
Instruction Register, IR
The IR is a 3 bit shift register that loads the instruction to be performed. The instructions are shifted
LSB first.
Table 25
1K
1K
RRING6
TRING6
shows the valid instruction codes and the corresponding instruction description.
AT2
AT1
RRING7
TRING7
RTIP6
TTIP6
RTIP7
RRING0
TTIP7
RTIP0
Transceiver 7
Transceiver 6
Transceiver 0
ASR Register
JTAG Port
Figure
16.
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