![](http://datasheet.mmic.net.cn/380000/-PD98405_datasheet_16745025/-PD98405_12.png)
12
7.4 PHY REGISTER.....................................................................................................................322
CHAPTER 8 JTAG BOUNDARY SCAN ........................................................................................365
8.1
FEATURES..........................................................................................................................365
8.2
INTERNAL CONFIGURATION OF BOUNDARY SCAN CIRCUIT.....................................366
8.2.1
Instruction Register .................................................................................................366
8.2.2
TAP Controller.........................................................................................................366
8.2.3
Bypass Register......................................................................................................366
8.2.4
Boundary Scan Register .........................................................................................367
8.3
PIN FUNCTIONS .................................................................................................................367
8.3.1
JCK Pin ...................................................................................................................367
8.3.2
JMS Pin...................................................................................................................367
8.3.3
JDI Pin.....................................................................................................................367
8.3.4
JDO Pin...................................................................................................................367
8.3.5
JRST_B Pin.............................................................................................................367
8.4
OPERATION........................................................................................................................368
8.4.1
TAP Controller.........................................................................................................368
8.4.2
TAP Controller States..............................................................................................368
8.5
TAP CONTROLLER OPERATION......................................................................................375
8.6
TAP CONTROLLER INITIALIZATION................................................................................378
8.7
INSTRUCTION REGISTER .................................................................................................378
8.7.1
BYPASS Instruction ................................................................................................379
8.7.2
EXTEST Instruction.................................................................................................379
8.7.3
Boundary Scan Data Bit Setting..............................................................................379
APPENDIX
DATA FORMATS ......................................................................................................381