UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 124

• 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

5.2.8 Port 7
using port mode register 7 (PM7). When the P70 to P77 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 7 (PU7).
124
Port 7 is an 8-bit I/O port with an output latch. Port 7 can be set to the input mode or output mode in 1-bit units
This port can also be used for key return input.
Reset signal generation sets port 7 to input mode.
Figure 5-21 shows a block diagram of port 7.
P7:
PU7:
PM7:
RD:
WR××: Write signal
WR
WR
WR
RD
PORT
PU
PM
Port register 7
Pull-up resistor option register 7
Port mode register 7
Read signal
PM70 to PM77
PU70 to PU77
(P70 to P77)
Output latch
Alternate
function
PM7
PU7
P7
Figure 5-21. Block Diagram of P70 to P77
CHAPTER 5 PORT FUNCTIONS
User’s Manual U17260EJ6V0UD
EV
DD
P-ch
P70/KR0 to
P77/KR7