Port - Toshiba TMP91C815F Data Book

3.5.2 Port 2 (P20 to P27)
Port 2 is an 8-bit output port. In addition to functioning as a output port, Port 2 can also function as an
address bus (A16 to A23).
Each bit can be set individually for address bus using the function register P2FC. Resetting sets all bits
of the function register P2FC to 1 and sets Port 2 to address bus.
Reset
Function control
(on bits basis)
P2FC write
Output
latch
P2 write
P2 read
S
S
A
B
Output buffer
Internal A16 to A23
Figure 3.5.2 Port 2
91C815-

Port 2

P20 to P27
(A16 to A23)
56
TMP91C815