• Free-running CLKA and CLKB may be asynchronous or

coincident (permits simultaneous reading and writing of data on

a single clock edge)

• 64 x 36 storage capacity FIFO buffering data from Port A to

Port B

• Mailbox bypass registers in each direction

• Dynamic Port B bus sizing of 36 bits (long word), 18-bits (word),

and 9 bits (byte)

• Selection of Big- or Little-Endian format for word and byte bus sizes

• Three modes of byte-order swapping on Port B

• Programmable Almost-Full and Almost-Empty flags

• Microprocessor interface control logic

• FF, AF flags synchronized by CLKA

• EF, AE flags synchronized by CLKB

• Passive parity checking on each Port

• Parity Generation can be selected for each Port