UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 129

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

5.2.11 Port 14
using port mode register 14 (PM14). When the P140 and P141 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 6-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 external interrupt request input, buzzer output, and clock output.
Reset signal generation sets port 14 to input mode.
Figures 5-25 shows a block diagram of port 14.
WR
WR
WR
P14:
PU14:
PM14:
RD:
WR××: Write signal
RD
PORT
PU
PM
Read signal
Port register 14
Pull-up resistor option register 14
Port mode register 14
PM140, PM141
PU140, PU141
(P140, P141)
Output latch
Alternate
Alternate
function
function
PM14
PU14
P14
Figure 5-25. Block Diagram of P140 and P141
CHAPTER 5 PORT FUNCTIONS
User’s Manual U17260EJ6V0UD
EV
DD
P-ch
P140/PCL/INTP6,
P141/BUZ/INTP7
129