User`s manual

Am486
®
Microprocessor PCI Customer Development Platform User’s Manual
2-36
R145 KBINHIBIT When R145 is populated and R146 is
removed (the default), the M5042
keyboard controller is enabled.
D15 (back
side)
Sheet 25
R146 KBINHIBIT When R145 is populated and R146 is
removed (the default), the M5042
keyboard controller is enabled.
D15 (back
side)
Sheet 25
R148 CLKMUL When R148 is populated and R11 is
removed (the default) the clock
multiplier for an Am486DX4-100 or
Am486DX5-133 microprocessor is
selected.
M17 Sheet 2
R170 IBCSTJ When populated (the default), the
M1487’s internal keyboard controller is
disabled. (The M1487 internal
keyboard controller function is
discontinued. The M5042 is provided
instead.)
I14 (back
side)
Sheet 16
R176 CLKPU2 When R176 is populated and R93 is
removed (the default), the system clock
speed is 33 MHz.
J3 Sheet 18
Table 2-11. Resistor Options (Continued)
Part Signal Description Location in
Figure 2-3
on Page 2-5
See App. B
Schematics
on: