UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 93

• 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

4.2.8 Port 14
using port mode register 14 (PM14). When the P140 to P143 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 14 (PU14).
Port 14 is a 4-bit I/O port with an output latch. Port 14 can be set to the input mode or output mode in 1-bit units
This port can also be used for segment output.
Reset signal generation sets port 14 to input mode.
Figure 4-14 shows a block diagram of port 14.
WR
P14:
PU14:
PM14:
PFALL: Port function register ALL
RD:
WR
WR
WR
WR
RD
PORT
PU
PM
PF
: Write signal
Read signal
Port register 14
Pull-up resistor option register 14
Port mode register 14
LCD controller/driver
PM140 to PM143
PU140 to PU143
(P140 to P143)
Output latch
PF14ALL
PFALL
PM14
PU14
P14
Figure 4-14. Block Diagram of P140 to P143
CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
V
DD
P-ch
P140/SEG8 to
P143/SEG11
93