Toshiba H1 Series Data Book page 128

3.7.5 Port 7 (P70 to P76)
Port7 is a 7-bit general-purpose I/O port (P70 is used for output only). Bits can be
individually set as either inputs or outputs by control register P7CR and function register
P7FC. In addition to functioning as a general-purpose I/O port, P70 to P76 pins can also
function interface-pin for external memory.
A reset initializes P70 pin to output port mode, and P71 to P76 pins to input port mode.
Setting the AM1 and AM0 pins as shown below and resetting the device initialize port 7
to the following function pins:
AM1
0
0
1
1
RD
Port read data
NDRE , NDWE
WRLL , WRLU
Port read data
Initial setting of P70 pin
AM0 Function Setting after reset is released
0
1
0
1
P7FC register
P7 register
P7CR register
P7FC register
P7 register
S
0
1
Selector
Selector
Figure 3.7.9 Port7
92CZ26A-125
Don't use this setting
pin
RD
Don't use this setting
Output port (P70)
S
0
1
Selector
S
0
1
Selector
S 1
0
TMP92CZ26A
P70 ( RD )
P71 ( WRLL , NDRE )
P72 ( WRLU , )
NDWE