Toshiba H1 Series Data Book page 120

3.7.1 Port 1 (P10 to P17)
Port1 is an 8-bit general-purpose I/O port. Bits can be individually set as either inputs or
outputs by control register P1CR and function register P1FC.
In addition to functioning as a general-purpose I/O port, port1 can also function as a data
bus (D8 to D15).
Setting the AM1 and AM0 pins as shown below and resetting the device initialize port 1
to the following function pins:
AM1
0
0
1
1
External write enable
D8 to D15
Port read data
D8 to D15
External read enable
AM0 Function Setting after reset is released
0 Don't use this setting
1 Data bus (D8 to D15)
0 Don't use this setting
1 Input port (P10 to P17)
P1CR Register
P1FC Register
P1 Register
S
1
0
Selector
Figure 3.7.1 Port1
92CZ26A-117
TMP92CZ26A
S
0
1
Selector
P10 to P17
(D8 to D15)