82C55A
231256 – 18
Figure 13 MODE Control Word
231256 – 19
Figure 14 MODE 2
Figure 15 MODE 2 (Bidirectional)
NOTE
Any sequence where WR occurs before ACK and STB occurs before RD is permissible
(INTR e IBF MASK STB RD a OBF MASK ACK WR)
14
231256 – 20