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P3n input
1 expected
P3nDR
0 expected
P3nDR
(n = 7 to 0)
(7)
Pin Functions
(a)
Normal Extended Mode
Port 3 pins are automatically set to function as bidirectional data bus pins.
(b)
Address-Data Multiplex Extended Mode
The operation is the same as that in single-chip mode.
(c)
Single-Chip Mode
The pin function is switched as shown below according to the P3nDDR bit and the P3nNCE bit.
P3nDDR
P3nNCE
Pin function
P3n input pin
[Legend] n = 7 to 0, X: Don't care
Figure 8.8 Noise Canceler Operation
0
0
1
DBn input
Section 8 I/O Ports
1
X
P3n output pin
Rev. 1.00 Mar. 12, 2008 Page 287 of 1178
REJ09B0403-0100
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