upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 94

• Manufacturer Part Number: upd78f0124m6gba1-8et
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

4.2.6 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).
94
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 input sets port 7 to input mode.
Figure 4-14 shows a block diagram of port 7.
PU7:
PM7:
RD:
WR××: Write signal
WR
WR
WR
RD
PORT
PM
PU
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
PU7
PM7
Figure 4-14. Block Diagram of P70 to P77
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16315EJ3V1UD
EV
DD
P-ch
P70/KR0 to
P77/KR7