UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 22

• 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

2.3 Pin I/O Circuits and Connection of Unused Pins
22
P20/TOH1
P21/INTP0
P22
P23/EXCLK
P32/INTP1
P34/RESET
P40 and P43
Table 2-1 shows I/O circuit type of each pin and the connections of unused pins.
For the configuration of the I/O circuit of each type, refer to Figure 2-1.
Type 2-A
Pull up
enable
Schmitt-triggered input with hysteresis characteristics
Pin Name
IN
Table 2-1. Types of Pin I/O Circuits and Connection of Unused Pins
8-A
2-A
8-A
I/O Circuit Type
P-ch
V
DD
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 2 PIN FUNCTIONS
Figure 2-1. Pin I/O Circuits
I/O
Input
I/O
I/O
Input:
Output: Leave open.
Set ENPU34 to “1” on the option byte, and leave the pin open.
Input:
Output: Leave open.
pullup
enable
output
disable
Type 8-A
data
Individually connect to V
Individually connect to V
Recommended Connection of Unused Pin
DD
DD
V
or V
or V
SS
V
SS
SS
DD
N-ch
P-ch
via resistor.
via resistor.
P-ch
V
DD
IN/OUT