upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 130

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

130
Symbol
Symbol
Symbol
Symbol
PU3H
PD3H
PU3L
PD3L
R/W
R/W
R/W
R/W
(g) Pull-up resistor option register 3 (PU3)
This is a 16-bit register used to set whether to use an on-chip pull-up resistor.
This register can be read and written only in 16-bit units.
However, when using the higher 8 bits of the PU3 register as the PU3H register and the lower
8 bits as the PU3L register, PU3 can be read and written in 8-bit and 1-bit units.
(h) Pull-down resistor option register 3 (PD3)
This is a 16-bit register used to set whether to use an on-chip pull-down resistor.
This register can be read and written only in 16-bit units.
However, when using the higher 8 bits of the PD3 register as the PD3H register and the lower
8 bits as the PD3L register, PD3 can be read and written in 8-bit and 1-bit units.
PU37
PD37
R/W
R/W
R/W
R/W
15
15
0
7
0
7
PU3n
Figure 4-26: Pull-down Resistor Option Register 3 (PD3) Format
0
1
Figure 4-25: Pull-up Resistor Option Register 3 (PU3) Format
PU36
PD36
R/W
R/W
R/W
R/W
14
14
0
6
0
6
Not connected
Connected
PU35
PD35
R/W
R/W
R/W
R/W
13
13
0
5
0
5
Connection of a pull-up resistor control (n = 0 to 8)
User’s Manual U16702EE3V2UD00
Chapter 4 Port Functions
PU34
PD34
R/W
R/W
R/W
R/W
12
12
0
4
0
4
PU33
PD33
R/W
R/W
R/W
R/W
11
11
0
3
0
3
PU32
PD32
R/W
R/W
R/W
R/W
10
10
0
2
0
2
PU31
PD31
R/W
R/W
R/W
R/W
9
0
1
9
0
1
PU38
PU30
PD38
PD30
R/W
R/W
R/W
R/W
8
0
8
0
FFFFFC47H
FFFFFC46H
FFFFFCA7H
FFFFFCA6H
Address
Address
Address
Address
After reset
After reset
After reset
After reset
0000H
0000H
0000H
0000H