Intel386™ EX MICROPROCESSOR USER'S MANUAL
CHAPTER 18
18.1
OVERVIEW ................................................................................................................. 18-1
18.2
18.2.1
Test Access Port (TAP) ..........................................................................................18-3
18.2.2
18.2.3
18.2.4
Data Registers ........................................................................................................18-8
18.3
TESTING ................................................................................................................... 18-10
18.3.1
Identifying the Device ............................................................................................18-10
18.3.2
18.3.3
18.3.4
18.3.5
18.4
TIMING INFORMATION ............................................................................................ 18-12
18.5
DESIGN CONSIDERATIONS.................................................................................... 18-14
APPENDIX B
B.1
B.1.1
DMA Unit ................................................................................................................ B-1
B.1.2
B.1.3
Interrupt Control Unit .............................................................................................. B-4
B.1.4
SIO Units ................................................................................................................ B-4
B.1.5
CPU-only Reset ...................................................................................................... B-4
B.1.6
HOLD, HLDA Pins .................................................................................................. B-4
B.1.7
Port B ...................................................................................................................... B-5
B.2
B.2.1
B.2.2
B.2.3
Microsoft* Windows* ............................................................................................... B-5
APPENDIX C
C.1
C.2
EXAMPLE CODE DEFINES ......................................................................................... C-6
xii