upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 51

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

4.1
shows the functions of each port.
CHAPTER 2 PIN FUNCTIONS.
Note For the setting method for pin functions, see CHAPTER 15 OPTION BYTE.
Caution The P22/X2/ANI2 and P23/X1/ANI3 pins are pulled down during reset.
Remarks 1. P22 and P23 can be allocated when the high-speed internal oscillation is selected as the system clock.
P20
P21
P22
P23
P32
P34
P40 to P47
The 78K0S/KY1+ has the ports shown in Figure 4-1, which can be used for various control operations. Table 4-1
In addition to digital I/O port functions, each of these ports has an alternate function.
Pin Name
Note
Note
Note
Functions of Ports
2. P22 can be allocated when an external clock input is selected as the system clock.
I/O
I/O
Input
I/O
I/O
Port 2.
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
On-chip pull-up resistor can be connected by setting software.
Port 3
Port 4.
8-bit I/O port.
Can be set to input or output mode in 1-bit units.
On-chip pull-up resistor can be connected setting software.
Port 4
CHAPTER 4 PORT FUNCTIONS
Figure 4-1. Port Functions
Table 4-1. Port Functions
User’s Manual U16994EJ3V0UD
Can be set to input or output mode in 1-
bit units.
On-chip pull-up resistor can be
connected by setting software.
Input only
P40
P47
Function
P20
P23
P32
P34
Port 2
Port 3
Input
Input
Input
Input
After Reset
For details, refer to
ANI0/TI000/TOH1
ANI1/TI010/TO00/
INTP0
X2/ANI2
X1/ANI3
INTP1
RESET
Function Pin
Alternate-
Note
Note
Note
−
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