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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
0
0
1
1
P4FC Register
A0 to A7
Read data
AM0
Function Setting after reset is released
0
Don't use this setting
1
Address bus (A0 to A7)
0
Don't use this setting
1
Output port (P40 to 47)
P4 Register
Figure 3.7.3 Port4
92CZ26A-119
S
0
1
Selector
TMP92CZ26A
P40 to P47
(A0 to A7)
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