upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 62

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

62
Address: FF32H, After reset: 00H R/W
Address: FF33H, After reset: 00H R/W
Address: FF34H, After reset: 00H R/W
Symbol
Symbol
Symbol
PU2
PU3
PU4
(4) Pull-up resistor option registers (PU2 to PU4)
These registers are used to specify whether an on-chip pull-up resistor is connected to P20 to P23, P32, and
P40 to P47. By setting PU2 to PU4, an on-chip pull-up resistor can be connected to the port pin corresponding
to the bit of PU2 to PU4.
PU2 to PU4 are set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation set these registers to 00H.
PUmn
PU47
7
0
7
0
7
0
1
Does not connect on-chip pull-up resistor
Connects on-chip pull-up resistor
PU46
6
0
6
0
6
Figure 4-11. Format of Pull-up Resistor Option Register
Selection of connection of on-chip pull-up resistor of Pmn (m = 2 to 4; n = 0 to 7)
PU45
5
0
5
0
5
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16994EJ3V0UD
PU44
4
0
4
0
4
PU23
PU43
3
3
0
3
PU22
PU32
PU42
2
2
2
PU21
PU41
1
1
0
1
PU20
PU40
0
0
0
0