upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 108

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

4.2.11 Port 14
using port mode register 14 (PM14). When the P140 to P145 pins are used as an input port, use of an on-chip pull-up
resistor can be specified by pull-up resistor option register 14 (PU14).
buzzer output, and clock output.
108
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, serial interface data I/O, clock I/O, busy input,
RESET input sets port 14 to input mode.
Figures 4-22 to 4-25 show block diagrams of port 14.
WR
WR
WR
RD
PU14: Pull-up resistor option register 14
PM14: Port mode register 14
RD:
WR××: Write signal
PORT
PU
PM
Read signal
PM140, PM141
PU140, PU141
(P140, P141)
Output latch
Alternate
Alternate
function
function
PU14
PM14
Figure 4-22. Block Diagram of P140 and P141
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15947EJ3V1UD
EV
DD
P-ch
P140/PCL/INTP6,
P141/BUZ/BUSY0/INTP7