UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 21

• 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

2.2.2 P32 and P34 (Port 3)
interrupt request signal.
reset function.
2.2.3 P40 and P43 (Port 4)
mode register 4 (PM4). In addition, an on-chip pull-up resistor can be connected to the port by using pull-up resistor
option register 4 (PU4).
2.2.4 RESET
regardless of the option byte setting.
2.2.5 V
2.2.6 V
P32 is a 1-bit I/O port. In addition to the function as an I/O port pin, this pin also has a function to input an external
P34 is a 1-bit input-only port. This pin is also used as a RESET pin, and when the power is turned on, this is the
For the setting method for pin functions, see CHAPTER 13 OPTION BYTE.
When P34 is used as an input port pin, connect the pull-up resistor.
P32 and P34 can be set to the following operation modes in 1-bit units.
(1) Port mode
(2) Control mode
Caution
P40 and P43 constitute a 2-bit I/O port. Each bit of this port can be set to the input or output mode by using port
This pin inputs an active-low system reset signal.
Caution
This is the positive power supply pin.
This is the ground pin.
Be sure to connect V
DD
SS
P32 functions as a 1-bit I/O port. This pin can be set to the input or output mode by using port mode register 3
(PM3). In addition, an on-chip pull-up resistor can be connected to the port by using pull-up resistor option
register 3 (PU3).
P34 functions as a 1-bit input-only port.
P32 functions as an external interrupt request input pin (INTP1) for which the valid edge (rising edge, falling
edge, or both rising and falling edges) can be specified. .
The P34/RESET pin is pulled up during reset by the reset pin function/power-on clear circuit.
The P34/RESET pin is pulled up during reset by the reset pin function/power-on clear circuit.
SS
to a stabilized GND (= 0 V).
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 2 PIN FUNCTIONS
When the power is turned on, this is the reset function,
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