SH7052 Datasheet, PDF (711/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

19.12 POD (Port Output Disable) Control
The output port drive buffers for the address bus pins (A20 to A0) and data bus pins (D15 to D0)
can be controlled by the POD (port output disable) pin input level. However, this function is
enabled only when the address bus pins (A20 to A0) and data bus pins (D15 to D0) are designated
as general output ports.
Output buffer control by means of POD is performed asynchronously from bus cycles.
POD
0
1
Address Bus Pins (A20 to A0) and
Data Bus Pins (D15 to D0) (when designated as output ports)
Enabled (high-impedance)
Disabled (general output)
685