Toshiba H1 Series Data Book page 126

3.7.4 Port 6 (P60 to P67)
Port6 is an 8-bit general-purpose I/O ports. Bits can be individually set as either inputs
or outputs and function by control register P6CR and function register P6FC.
In addition to functioning as a general-purpose I/O port, port6 can also function as an
address bus (A16 to A23). Setting the AM1 and AM0 pins as shown below and resetting the
device initialize port 6 to the following function pins:
AM1
0
0
1
1
A16 to A23
Read data
AM0 Function Setting after reset is released
0 Don't use this setting
1 Address bus(A16 ~ A23)
0 Don't use this setting
1 Input port(P60 ~ P67)
P6CR Register
P6FC Register
P6 Register
S
1
0
Selector
Figure 3.7.7 Port6
92CZ26A-123
S
0
1
Selector
TMP92CZ26A
P60 to P67
(A16 to A23)