AMD-K6-2E Datasheet, PDF (7/332 Pages) Advanced Micro Devices – AMD-K6™-2E Embedded Processor

22529B/0—January 2000
Preliminary Information
AMD-K6™-2E Processor Data Sheet
7.4 State of Processor After INIT ................................................ 183
8 Cache Organization .................................................................. 185
8.1 MESI States in the Data Cache ............................................. 186
8.2 Predecode Bits......................................................................... 187
8.3 Cache Operation ..................................................................... 187
8.4 Cache Disabling and Flushing ............................................... 190
8.5 Cache-Line Fills ...................................................................... 191
8.6 Cache-Line Replacements...................................................... 192
8.7 Write Allocate ......................................................................... 192
8.8 Prefetching .............................................................................. 197
8.9 Cache States ............................................................................ 198
8.10 Cache Coherency .................................................................... 199
8.11 Writethrough and Writeback Coherency States.................. 204
8.12 A20M# Masking of Cache Accesses ...................................... 204
9 Write Merge Buffer ................................................................. 205
9.1 EWBE# Control ....................................................................... 205
9.2 Memory Type Range Registers ............................................. 207
9.3 Memory-Range Restrictions .................................................. 209
9.4 Examples.................................................................................. 211
10 Floating-Point and Multimedia Execution Units .................. 213
10.1 Floating-Point Execution Unit............................................... 213
10.2 Multimedia and 3DNow!™ Execution Units ........................ 215
10.3 Floating-Point and MMX™/3DNow!™
Instruction Compatibility....................................................... 216
11 System Management Mode (SMM) ........................................ 217
11.1 SMM Operating Mode and Default Register Values........... 217
11.2 SMM State-Save Area............................................................. 219
11.3 SMM Revision Identifier........................................................ 221
11.4 SMM Base Address ................................................................. 222
11.5 Halt Restart Slot ..................................................................... 222
11.6 I/O Trap Doubleword .............................................................. 223
11.7 I/O Trap Restart Slot .............................................................. 224
11.8 Exceptions, Interrupts, and Debug in SMM......................... 226
12 Test and Debug ......................................................................... 227
12.1 Built-In Self-Test (BIST) ......................................................... 227
12.2 Three-State Test Mode ........................................................... 228
12.3 Boundary-Scan Test Access Port (TAP)................................ 229
12.4 L1 Cache Inhibit...................................................................... 239
12.5 Debug ....................................................................................... 240
13 Clock Control ............................................................................ 247
13.1 Clock Control States ............................................................... 247
13.2 Halt State................................................................................. 249
13.3 Stop Grant State...................................................................... 250
13.4 Stop Grant Inquire State........................................................ 251
13.5 Stop Clock State...................................................................... 252
14 Electrical Data .......................................................................... 253
14.1 Operating Ranges ................................................................... 254
Contents
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