TMP92CF30
2009-06-12
92CF30-93
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)
Address bus (A0 to A7)
Don’t use this setting
Figure 3.7.3 Port4
P4FC Register
P4 Register
S
0
1
Selector
A0 to A7
Read data
P40 to P47
(A0 to A7)
Содержание TLCS-900/H1 Series
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