User manual

USER CUSTOMIZATION
M68CPU32BUG REV 1 C-18
C.8 PLATFORM BOARD (PFB) REV. C COMPATIBILITY
PFB Rev. C boards have jumpers (J8 - J13) which when installed, make Rev. C PFB’s
compatible with Rev. A, Rev. B or Rev. C BCC boards . When switching jumpers from Rev. A
to Rev. B or C compatibility on a Rev. C PFB, all jumpers must be set to the same selection.
Table C-6. PFB Rev. C Compatibility
PFB Rev. C
BCC
BOARD REVISION
PFB
Rev. A
PFB
Rev. B
Jumper block
not installed
(1)
Jumpers
installed for
Rev. A
Jumpers
installed for
Rev. B
BCC Rev. A YES NO NO YES NO
BCC Rev. B NO YES YES NO YES
BCC Rev. C NO YES YES NO YES
(1) The default when no jumper block is installed is Rev. B.
USER CUSTOMIZATION
M68CPU32BUG REV 1 C-15
C.5 BCC REV. A CHIP SELECTION SUMMARY
Table C-3 covers Rev. A of the M68332BCC Business Card Computer and M68332PFB
Platform Board.
Table C-3. Rev. A Chip Selection Summary
Signal Board/Chip Description Memory Type
CSBOOT BCC U4 CPU32Bug EPROM
CS0 BCC U3 read/write enable for MSB=UPPER=EVEN RAM
CS1 BCC U2 read/write enable for LSB=LOWER=ODD RAM
CS2 PFB U1/U3 read enable for MSB/LSB=BOTH RAMS
CS3 PFB U1 write enable for LSB=LOWER=ODD RAM
CS4 PFB U4 read enable for MSB=UPPER=EVEN RAM/EPROM
CS5 PFB U2 read enable for LSB=LOWER=ODD RAM/EPROM
CS6 PFB U5 chip enable for MC68881/882
CS7 <unused>
CS8 PFB ABORT pushbutton autovector
CS9 <unused>
CS10 PFB U3 write enable for MSB=UPPER=EVEN
cut/jump U3-27 from CS4 to CS10 required.
RAM.
NOTE
U1/U3 = 120 nsec RAM with fast termination.
U2/U4 = ROM laid-out wrong, can only be configured as 120 nsec RAM.
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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