Hardware manual

Rev. 3.0, 09/98, page 121 of 361
Pin P9
7
: In modes 1 and 2, this pin is used for input of the WAIT bus control signal. It is
unaffected by the values in P9DDR and P9DR.
In mode 3 (single-chip mode), this pin can be used for general-purpose input or output.
Reset: In the single-chip mode (mode 3), a reset initializes all pins of port 9 to the general-
purpose input function. In the expanded modes (modes 1 and 2), P9
0
to P9
2
are initialized as input
port pins, and P9
3
to P9
7
are initialized to their bus control and system clock output functions.
Hardware Standby Mode: All pins are placed in the high-impedance state.
Software Standby Mode: All pins remain in their previous state. For RD, WR, AS, and φ this
means the High output state.