Intel Embedded Intel486 - Page 183

7-11
PERIPHERAL SUBSYSTEM
Figure 7-5. Bus Swapping 16-Bit Interface
Table 7-9 shows the truth table for 32-to-16-bit bus swapping logic and A0, A1 and BHE# gen-
eration.
The PLD equation used to implement 32-bit-to-16-bit byte swap logic is shown in Tables 7-6
and 7-7.
BUFF 0
BUFF 1
BUFF 2
BUFF 3
BE3#
BE2#
BE1#
BE0#
8
8
8
8
8
8
8
8
16-Bit
BEN16#
BUFF 4
BUFF 5