UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 53

• 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

4.2.2
mode register 3 (PM3). When this pin is used as an input port, an on-chip pull-up resistor can be connected in 1-bit
units by using pull-up resistor option register 3 (PU3). This pin can also be used for external interrupt request input.
is the reset function. For the setting method for pin functions, see CHAPTER 13 OPTION BYTE.
The P32 pin is a 1-bit I/O port with an output latch. This pin can be set to the input or output mode by using port
The P32 pin is a Reset signal generation sets port 3 to the input mode.
The P34 pin is a 1-bit input-only port. This pin is also used as a RESET pin, and when the power is turned on, this
When P32 and P34 are used as an input port pins, connect the pull-up resistor.
Figures 4-5 and 4-6 show the block diagrams of port 3.
Port 3
P3:
PU3:
PM3:
RD:
WR
WR
WR
WR
RD
PORT
: Write signal
PM
PU
Port register 3
Pull-up resistor option register 3
Port mode register 3
Read signal
Output latch
Alternate
function
PM32
PU32
(P32)
PU3
PM3
P3
Figure 4-5. Block Diagram of P32
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 4 PORT FUNCTIONS
V
DD
P-ch
P32/INTP1
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