Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 20 Port 3
FEUL620Q504 20–5
20.2.2 Port 3 Data Register (P3D)
Address: 0F228H
Access: R/W
Access size: 8 bits
Initial value: 00H
7 6 5 4 3 2 1 0
P3D
P37D P36D P35D P34D P33D P32D P31D P30D
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
P3D is a special function register (SFR) to set the value to be output to the Port 3 pin or to read the input level of
the Port 3. In output mode, the value of this register is output to the Port 3 pin. The value written to P3D is
readable. In input mode, the input level of the Port 3 pin is read when P3D is read.
Output mode or input mode is selected by using the port mode register (P3DIR) described later.
Description of Bits
•
P37-30D (bits 7 to 0)
The P37-30D bits are used to set the output value of the Port 3 pin in output mode and to read the pin
level of the Port 3 pin in input mode.
P30D Description
0 Output or input level of the P30 pin: ”L”
1 Output or input level of the P30 pin: ”H”
P31D Description
0 Output or input level of the P31 pin: ”L”
1 Output or input level of the P31 pin: ”H”
P32D Description
0 Output or input level of the P32 pin: ”L”
1 Output or input level of the P32 pin: ”H”
P33D Description
0 Output or input level of the P33 pin: ”L”
1 Output or input level of the P33 pin: ”H”
P34D Description
0 Output or input level of the P34 pin: ”L”
1 Output or input level of the P34 pin: ”H”
P35D Description
0 Output or input level of the P35 pin: ”L”
1 Output or input level of the P35 pin: ”H”
P36D Description
0 Output or input level of the P36 pin: ”L”
1 Output or input level of the P36 pin: ”H”