
Programmable I/O Port
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
147
Figure 1.19.6. Direction register
Port P3 direction register
Symbol
Address
When reset
PD3
03E716
XX0000002
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
PD3_0
Port P30 direction register
PD3_1
Port P31 direction register
PD3_2
Port P32 direction register
PD3_3
Port P33 direction register
PD3_4
Port P34 direction register
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
PD3_5
Port P35 direction register
Port Pi direction register (Note)
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
PDi_0
Port Pi0 direction register
PDi_1
Port Pi1 direction register
PDi_2
Port Pi2 direction register
PDi_3
Port Pi3 direction register
PDi_4
Port Pi4 direction register
PDi_5
Port Pi5 direction register
PDi_6
Port Pi6 direction register
PDi_7
Port Pi7 direction register
0 : Input mode
(Functions as an input port)
1 : Output mode
(Functions as an output port)
(i = 0 to 12 except 3 and 7)
Symbol
Address
When reset
PDi ( i = 0 to 12 except 3 and 7)
03E216, 03E316, 03E616, 03EA16,
0016
03EB16, 03EE16, 03F216, 03F316,
03F616, 03F716, 03FA16
Note : Do not access the Port P12 direction register in words.
Port P7 direction register
Symbol
Address
When reset
PD7
03EF16
X00000002
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
PD7_0
Port P70 direction register
PD7_1
Port P71 direction register
PD7_2
Port P72 direction register
PD7_3
Port P73 direction register
PD7_4
Port P74 direction register
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be
indeterminate.
PD7_5
Port P75 direction register
PD7_6
Port P76 direction register
Port P13 direction register
Symbol
Address
When reset
PD13
03FB16
XXXXX0002
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2
b1
b0
PD13_0
Port P130 direction register
PD13_1
Port P131 direction register
PD13_2
Port P132 direction register
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.