
DS21Q55 Quad T1/E1/J1 Transceiver
5 of 237
30.
JTAG BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT...............................198
D
ESCRIPTION
................................................................................................198
I
NSTRUCTION
R
EGISTER
.................................................................................201
SAMPLE/PRELOAD .............................................................................................202
BYPASS ...............................................................................................................202
EXTEST................................................................................................................202
CLAMP .................................................................................................................202
HIGHZ ..................................................................................................................202
IDCODE................................................................................................................202
30.3
T
EST
R
EGISTERS
...........................................................................................203
30.4
B
OUNDARY
S
CAN
R
EGISTER
..........................................................................203
30.5
B
YPASS
R
EGISTER
........................................................................................203
30.6
I
DENTIFICATION
R
EGISTER
.............................................................................203
31.
FUNCTIONAL TIMING DIAGRAMS..........................................................................................207
31.1
T1 M
ODE
......................................................................................................207
31.2
E1 M
ODE
......................................................................................................212
32.
OPERATING PARAMETERS....................................................................................................221
30.1
30.2
33.
AC TIMING PARAMETERS AND DIAGRAMS .........................................................................223
M
ULTIPLEXED
B
US
AC C
HARACTERISTICS
......................................................223
N
ONMULTIPLEXED
B
US
AC C
HARACTERISTICS
................................................226
R
ECEIVE
-S
IDE
AC C
HARACTERISTICS
.............................................................229
T
RANSMIT
AC C
HARACTERISTICS
...................................................................232
PACKAGE INFORMATION.......................................................................................................235
33.1
33.2
33.3
33.4
34.