UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 55

• 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

4.3
The ports are controlled by the following four types of registers.
Port mode registers (PM2 to PM4)
Port registers (P2 to P4)
Pull-up resistor option registers (PU2 to PU4)
Registers Controlling Port Functions
P4:
PU4:
PM4:
RD:
WR
WR
WR
WR
RD
: Write signal
PORT
PM
PU
Port register 4
Pull-up resistor option register 4
Port mode register 4
Read signal
PM40, PM43
Output latch
PU40, PU43
(P40, P43)
PM4
PU4
P4
Figure 4-7. Block Diagram of P40 and P43
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 4 PORT FUNCTIONS
V
DD
P-ch
P40, P43
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