Rev. 1.0, 09/01, page 436 of 904
10.4
Port 4
Port 4 is an 8-bit input-only port. Port 4 has the following register.
•
Port 4 register (PORT4)
10.4.1
Port 4 Register (PORT4)
PORT4 is an 8-bit read-only register that shows port 4 pin states.
PORT4 cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
P47
—*
R
6
P46
—*
R
5
P45
—*
R
4
P44
—*
R
3
P43
—*
R
2
P42
—*
R
1
P41
—*
R
0
P40
—*
R
The pin states are always read from this register.
Note:
Determined by the states of pins P47 to P40.
10.4.2
Pin Functions
Port 4 also functions as the pins for A/D converter analog input and D/A converter analog output.
The correspondence between pins are as follows.
P47/AN7/DA1
AN7 input
Pin function
DA1 output
P46/AN6/DA0
AN6 input
Pin function
DA0 output
Содержание H8S/2376 F-ZTAT
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