UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 85

• 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

4.2.4 Port 4
using port mode register 4 (PM4). When the P40 pin is 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 4 (PU4).
Port 4 is a 1-bit I/O port with an output latch. Port 4 can be set to the input mode or output mode in 1-bit units
This port can also be used for power supply voltage pins for driving the LCD and key interrupt input pin.
Reset signal generation sets port 4 to input mode.
Figures 4-7 show a block diagram of port 4.
WR
WR
WR
P4:
PU4:
PM4:
LCDM: LCD display mode register
RD:
WR
RD
PORT
PU
PM
: Write signal
Read signal
Port register 4
Pull-up resistor option register 4
Port mode register 4
LCDM0 to LCDM2
Output latch
Alternate
function
LCDM
PU40
PM40
(P40)
PM4
PU4
P4
Figure 4-7. Block Diagram of P40
CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
V
LC3
V
DD
P-ch
P40/V
LC3
/KR0
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