Cyclone System Board Manual
Chapter 2: Configuring the Cyclone
Jumper Settings
This section provides the jumper settings for the Cyclone system board.
Table 2-1 lists the Intel and AMD CPU speed settings and the jumper
settings that select these speeds.
Table 2-2 lists the jumper settings to set the CPU voltage for
the following processors: Intel P54, P55 and AMD K5-166,
K5-200, K6-166, K6-200 and K6-233.
NOTE: The AMD
K6-233MHz has two versions of voltages (2.2V and 3.2V).
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Table 2-2: CPU Voltage Selection
*Default Setting
Table 2-1: System Speed Selection
CPU Voltage
W16
W17 W18 W23 W24
3.5V (P54C, P55CTB,
K5-166, K5-200)
Open Open Open Close Open
2.8V (P55C)
Close Open Open Open Open
2.9V (K6-166, K6-200) Open Close Open Open Open
3.2V (K6-233)*
Open Open Close Open Open
2.2V (K6-233, K6-266)
Open Open Open Open Close
CPU Speed Bus Speed
W2
W3
W4
W5
W6
W7
75 MHz
50 x 1.5
Open Open Close
2-3
2-3
2-3
90 MHz
60 x 1.5
Open Open Close
1-2
2-3
2-3
100 MHz
66 x 1.5
Open Open Close
2-3
1-2
2-3
120 MHz
60 x 2.0
Close Open Open
1-2
2-3
2-3
133 MHz
66 x 2.0
Close Open Open
2-3
1-2
2-3
150 MHz
60 x 2.5
Close Close Open
1-2
2-3
2-3
166 MHz
66 x 2.5
Close Close Open
2-3
1-2
2-3
180 MHz
60 x 3.0
Open Close Open
1-2
2-3
2-3
200 MHz*
66 x 3.0
Open Close Open
2-3
1-2
2-3
233 MHz
66 x 3.5
Open Open Open
2-3
1-2
2-3
266 MHz
66 x 4.0
Close Open Close
2-3
1-2
2-3
For jumper
groups W16-
W18 and
W23-W24,
make sure
that only
one jumper
out of each
group is set
to ON
before
applying
power.
