5-8 Bus Interface
AMD-K5 Processor Technical Reference Manual 18524C/0—Nov1996
Table 5-2. Conditions for Driving and Sampling Signals
Signal
Conditions under which signals are meaningfully driven or sampled
Bus Cycles or Cache Accesses
38
Arbitration
States and Modes
8
Reset,
Debug
Memory Reads
14
Memory Writes
14
Cache Hits
39
Inquire Cycles
3
I/O Cycles
Locked Cycles
Special Cycles
Interrupt Acknow.
AHOLD Active
BOFF Active
HLDA Active
Shutdown
33
Halt
Stop Grant
Stop Clock
SMIACT Active
RESET Active
INIT Active
PRDY Active
Bus Arbitration
AHOLD I
23 —
BOFF I —
BREQ O 38
HLDA O 39 35 —
HOLD I 35
Address and Address Parity
A20M
I 10 10 10 10 10 10 10 10 10
A31–A3
2
I/O 44 19 19 7 4 4 3 3 3
AP I/O 38 7 4 4 3 3 3
ADS O 38 37 3 3 3 3
ADSC O 38 37 3 3 3 3
APCHK O 7 3 3 3 3 3 3 3 3
BE7
–BE0 38 37 16 3 3 3
Cycle Definition and Control
D/C
O 38 37 16 3 3 3
EWBE I 37 26 26 3 3 3
LOCK O 38 1 — 16
M/IO O 38 37 16 3 3 3
NA
18
I 18 18 18 16 18
SCYC O 13 13 13
13 13
W/R
O 38 37 16 3 3 3