UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 79

• 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

4.2.1 Port 1
using port mode register 1 (PM1). When the P12 and P13 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 1 (PU1).
Port 1 is a 2-bit I/O port with an output latch. Port 1 can be set to the input mode or output mode in 1-bit units
This port can also be used for key interrupt input and serial interface data I/O.
Reset signal generation sets port 1 to input mode.
Figures 4-2 and 4-3 show block diagrams of port 1.
WR
WR
WR
RD
P1:
PU1:
PM1:
RD:
WR
PORT
PM
PU
: Write signal
Read signal
Port register 1
Pull-up resistor option register 1
Port mode register 1
Output latch
Alternate
function
PM12
PU12
(P12)
PM1
PU1
P1
Figure 4-2. Block Diagram of P12
CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
V
DD
P-ch
P12/RxD0/KR3/<RxD6>
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