Toshiba TLCS-900/H1 Series Manual page 75

3.5.4 Port 4 (P40 to P47)
Port 4 is an 8-bit general-purpose output port.
In addition to functioning as a general-purpose output port, port 4 can also function as an
address bus (A0 to A7).
AM1
0
0
1
1
A0 to A7
Port read data
AM0 Function Setting after Reset is Released
0
1
0
1
P4FC register
P4 register
Figure 3.5.7 Port 4
92CH21-73
Don't use this setting
Address bus (A0 to A7)
Address bus (A0 to A7)
Output port
S
0
1
Selector
TMP92CH21
P40 to P47
(A0 to A7)
2009-06-19