upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 92

• Manufacturer Part Number: upd78f0114m6gb-8es
• 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 P73 pins are used as an input port, use of an on-chip pull-up
resistor can be specified by pull-up resistor option register 7 (PU7).
92
Port 7 is a 4-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 4-13 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 PM73
PU70 to PU73
(P70 to P73)
Output latch
Alternate
function
PM7
PU7
Figure 4-13. Block Diagram of P70 to P73
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16227EJ3V0UD
EV
DD
P-ch
P70/KR0 to
P73/KR3