Toshiba H1 Series - Manual (Page 122)

TMP92CZ26A
92CZ26A-119
3.7.2 Port 4 (P40 to P47)
Port4 is an 8-bit general-purpose Output ports. In addition to functioning as a
general-purpose Output port, port4 can also function as an address bus (A0 to A7). Each bit
can be set individually for function. Setting the AM1 and AM0 pins as shown below and
resetting the device initialize port 4 to the following function pins:
AM1 AM0 Function Setting after reset is released
0
0
1
1 0
1
0
1 Don’t use this setting
Address bus (A0 to A7)
Don’t use this setting
Output port (P40 to 47)
Figure 3.7.3 Port4
P4FC Register
P4 Register
S
0
1
Selector
A0 to A7
Read data
P40 to P47
(A0 to A7)