upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 89

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

4.2.9 Port 14
mode register 14 (PM14). When the P140 pin is 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 1-bit I/O port with an output latch. Port 14 can be set to the input mode or output mode using port
This port can also be used for external interrupt request input and clock output.
RESET input sets port 14 to input mode.
Figure 4-17 shows a block diagram of port 14.
WR
WR
WR
PU14:
PM14: Port mode register 14
RD:
WR××: Write signal
RD
PORT
PM
PU
Pull-up resistor option register 14
Read signal
Output latch
Alternate
Alternate
function
function
PM140
PU140
(P140)
PM14
PU14
Figure 4-17. Block Diagram of P140
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16962EJ3V0UD
EV
DD
P-ch
P140/PCL/INTP6
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