UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 83

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

4.2.3 Port 3
using port mode register 3 (PM3). When the P31 to P34 pins are used as an input port, use of an on-chip pull-up
resistor can be specified in 1-bit units by pull-up resistor option register 3 (PU3).
time counter output, and buzzer output.
Port 3 is a 4-bit I/O port with an output latch. Port 3 can be set to the input mode or output mode in 1-bit units
This port can also be used for external interrupt request input, timer I/O, manchester code generator output, real-
Reset signal generation sets port 3 to input mode.
Figures 4-5 and 4-6 show block diagrams of port 3.
WR
WR
WR
RD
P3:
PU3:
PM3:
RD:
WR
PORT
PU
PM
: Write signal
Read signal
Port register 3
Pull-up resistor option register 3
Port mode register 3
PM31, PM33, PM34
(P31, P33, P34)
PU31, PU33, PU34
Output latch
Alternate
Alternate
function
function
PM3
PU3
P3
Figure 4-5. Block Diagram of P31, P33, P34
CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
V
DD
P-ch
P31/TOH1/INTP3,
P33/TI000/RTCDIV/RTCCL/BUZ/INTP2,
P34/TI52/TI010/TO00/RTC1HZ/INTP1
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