Intel YM430TX User Manual page 16

3. Voltage Regulator Output Selection (VID0)
These jumpers set the voltage supplied to the CPU. The onboard voltage regulators
will automatically detect and switch between single power plane & dual power
plane CPUs. A CPU is usually referred to by its Vcore voltage.
(Single Plane)
Type Vcore Vio
VRE 3.5V
STD 3.4V
CPU Vcore Voltage Selection
4. CPU External (Bus) Frequency Selection (FS0, FS1, FS2)
These jumpers tell the clock generator what frequency to send to the CPU.
These allow the selection of the CPU's external frequency (or bus clock).
The bus clock times the bus ratio equals the CPU's internal frequency (the
advertised CPU speed).
5. CPU to Bus Frequency Ratio (BF0, BF1)
These jumpers set the frequency ratio between the internal frequency of the CPU
and the external frequency (called the bus clock) within the CPU. These must be
set together with the jumpers for CPU External (Bus) Frequency Selection.
16
(Dual Plane)
Vcore Vio
3.5V 2.9V 3.3V
3.4V 2.8V 3.3V
VID 0
1
2
3
Single Plane VRE (3.5V)
Dual Plane (2.9Volt)
1 1
1
2 2 2
3 3 3
1.5X(3/2) 2.0x(2/1) 2.5x(5/2)
CPU : BUS Frequency Ratio
CPU External Clock (BUS)
Frequency Selection
1 1
2
2
3
3
66MHz
60MHz
Intel YM430TX User's Manual
VID0
[1-2]
[2-3]
VID 0
1
2
3
STD (3.4V)
(2.8Volt)
1
2
3
3.0(3/1)