Motorola MVME162P-244 Series, Installation And Use Manual

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Preparing the Board
http://www.motorola.com/computer/literature 1-17
1
General-Purpose Readable Switch (S4 Pin 5)
Switch S4 is similar in function to the general-purpose readable jumper
headers found on earlier MVME162/172 series boards. S4 provides eight
software-readable switch segments. These switches can be read as bits in
a register (at address $FFF4202C) in the MC2 General-Purpose Inputs
register in the Petra ASIC (refer to the Programmer’s Reference Guide for
details). Bit GPI7 is associated with switch segment 1; bit GPI0 is
associated with switch segment 8. The bit values are read as a 0 when the
switch is on, and as a 1 when the switch is off. The MVME162P4 is
shipped from the factory with S4 set to all 0s (all switches set to
ON
), as
diagrammed below.
If the MVME162Bug firmware is installed, four bits are user-definable
(i.e., switch segments 1-4). If the MVME162Bug firmware is not installed,
seven bits are user-definable (i.e., segments 1-4 and segments 6-8).
Note Switch segment 5 (GPI3) is reserved to select either the Flash
memory map (switch set to
ON
) or the EPROM memory map
(switch set to
OFF
). GPI3 is not user-definable.
.
OFF ON
Flash Selected
(factory configuration)
GPI7
USER-DEFINABLE
S4
1
GPI6
GPI5
GPI4
GPI3
GPI2
GPI1
GPI0
5
8
162 BUG Installed (default) User Code Installed
USER-DEFINABLE
USER-DEFINABLE
USER-DEFINABLE
ON=FLASH; OFF=EPROM
REFER TO DEBUG MANUAL
REFER TO DEBUG MANUAL
REFER TO DEBUG MANUAL
USER-DEFINABLE
USER-DEFINABLE
USER-DEFINABLE
USER-DEFINABLE
ON=FLASH; OFF=EPROM
REFER TO DEBUG MANUAL
REFER TO DEBUG MANUAL
REFER TO DEBUG MANUAL
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