UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 157

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) Port registers (P0 to P3, P6 to P9, P12)
Symbol
For 78K0/DE2
For 78K0/DF2
For 78K0/DE2
For 78K0/DF2
These registers write the data that is output from the chip when data is output from a port.
If the data is read in the input mode, the pin level is read. If it is read in the output mode, the value of the output
latch is read.
These registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears these registers to 00H.
P0
P1
P2
P2
P3
P6
P7
P7
P8
P07
P17
P27
P37
P77
P87
7
7
7
0
7
7
7
0
7
0
7
7
P06
P16
P26
P36
P76
P86
6
6
6
0
6
6
6
0
6
0
6
6
P05
P15
P25
P35
P75
P85
5
5
5
0
5
5
5
0
5
0
5
5
Figure 4-26. Format of Port Register (1/2)
P04
P14
P24
P34
P74
P84
4
4
4
0
4
4
4
0
4
0
4
4
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 4 PORT FUNCTIONS
P03
P13
P23
P23
P33
P73
P73
P83
3
3
3
3
3
3
0
3
3
3
P02
P12
P22
P22
P32
P72
P72
P82
2
2
2
2
2
2
0
2
2
2
P01
P11
P21
P21
P31
P61
P71
P71
P81
1
1
1
1
1
1
1
1
1
P00
P10
P20
P20
P30
P60
P70
P70
P80
0
0
0
0
0
0
0
0
0
Address
FF00H
FF01H
FF02H
FF02H
FF03H
FF06H
FF07H
FF07H
FF08H
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
00H (output latch)
After reset
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
155