Comments - AMD K5 Technical Reference Manual

18524C/0—Nov1996

Comments

Bus Interface
The selection of the drive strengths differs between the Pen-
tium processor and the AMD-K5 processor as follows:
Drive Strength
Strength 1 (weak)
Strength 2 (medium)
Strength 3 (strong)
Strength 1 (weak)
Strength 1(weak)
Strength 2 (medium)
AMD-K5 Model 0 Rev F and Model 1
Strength 1 (weak)
Strength 2 (medium)
Strength 2 (medium)
In addition to the different selction criteria, the exact drive
characteristics of the two strengths for the AMD-K5 processor
Model 0 Rev E differ from the Intel parts. Those differences
are as follows:
AMD-K5 Processor Model 0 Rev E
AMD-K5 processor Drive Strength 1 is between the Pentium
processor Drive Strength weak and medium
AMD-K5 processor Drive Strength 2 is between the Pentium
processor Drive Strength medium and strong
The only way to get the AMD-K5 processor Drive Strength 2
is to select the Pentium processor Drive Strength strong (as
shown in the table above)
AMD-K5 Processor Model 0 Rev F and Model 1
AMD-K5 processor Drive Strength 1 equals the Pentium
processor Drive Strength weak
AMD-K5 processor Drive Strength 2 equals the Pentium
processor Drive Strength medium
The only way to get the AMD-K5 processor Drive Strength 1
is to select the Pentium processor Drive Strength weak (as
shown in the table above)
AMD-K5 Processor Technical Reference Manual
BRDYC
Pentium
1
0
0
AMD-K5 Model 0 Rev E
1
0
0
1
0
0
BUSCHK
X
1
0
X
1
0
X
1
0
A-7