User`s manual

Am486
®
Microprocessor PCI Customer Development Platform User’s Manual
2-6
Jumper Functions
Table 2-1 describes the configuration jumpers on the PCI CDP.
Table 2-1. Board Jumper Summary
Part Signal Description Location in
Figure 2-3
on Page 2-5
See App. B
Schematics
on:
For More
Info., See:
JP2 CPUV
CC
3 Used with JP3 to select
either 5-V CPU voltage or
the adjustable voltage set by
jumper JP4. Both JP2 and
JP3 must be positioned the
same.
Q15 Sheet 3 page 2-32
JP3 CPUV
CC
3 Used with JP2 to select
either 5-V CPU voltage or
the adjustable voltage set by
jumper JP4. Both JP2 and
JP3 must be positioned the
same.
Q16 Sheet 3 page 2-32
JP4 CPUV1,
CPUV2,
CPUV3
Selects the CPU voltage
used when JP2 and JP3 are
set to “ADJ.” The selectable
voltages are 3.45 V, 3.3 V,
and 2.5 V.
R15 Sheet 3 page 2-32
JP32 Boot ROM
A17
Used to configure boot
ROM address signal A17.
C14 Sheet 17 page 2-21
JP33 Boot ROM
A18
Used to configure boot
ROM address signal A18.
B14 Sheet 17 page 2-21