UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 48

• Manufacturer Part Number: UPD78F9502MA-CAC-A
• Description: 8BIT MCU, 4K FLASH, 128B RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F9502MA-CAC-A

• Controller Family/series: UPD78F
• No. Of I/o's: 8
• Ram Memory Size: 128Byte
• Cpu Speed: 10MHz
• No. Of Timers: 2
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

4.1
operations. Table 4-1 shows the functions of each port.
CHAPTER 2 PIN FUNCTIONS.
Note
Caution The P22 and P23/EXCLK pins are pulled down during reset. The P34/RESET pin is pulled up during
Remark
48
P20
P21
P22
P23
P32
P34
P40 and P43
The PD78F9500, 78F9501, 78F9502 have the ports shown in Figure 4-1, which can be used for various control
In addition to digital I/O port functions, each of these ports has an alternate function.
Pin Name
Note
Note
Functions of Ports
For the setting method for pin functions, see CHAPTER 13 OPTION BYTE.
reset by the reset pin function/power-on clear circuit.
P23 can be allocated when the high-speed internal oscillation 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
On-chip pull-up
resistor can be
connected by
setting software.
Port 4.
2-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
Preliminary User’s Manual U18681EJ1V0UD
Figure 4-1. Port Functions
Table 4-1. Port Functions
P40
P43
Can be set to input or output mode in 1-
bit units.
Input only
Function
P20
P23
P32
P34
Port 2
Port 3
Input
Input
Input
Input
After Reset
For details, refer to
TOH1
INTP0
EXCLK
INTP1
RESET
Function Pin
Alternate-
Note
Note
-