upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 87
upd78f0124hgba1-8et-a
Manufacturer Part Number
upd78f0124hgba1-8et-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0124HGBA1-8ET-A.pdf
(502 pages)
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4.2.7 Port 12
using port mode register 12 (PM12). When used as an input port, use of an on-chip pull-up resistor can be specified
by pull-up resistor option register 12 (PU12).
Port 12 is a 1-bit I/O port with an output latch. Port 12 can be set to the input mode or output mode in 1-bit units
This port can also be used for external interrupt input.
RESET input sets port 12 to input mode.
Figure 4-15 shows a block diagram of port 12.
PU12:
PM12: Port mode register 12
RD:
WR××: Write signal
WR
WR
WR
RD
PORT
PM
PU
Pull-up resistor option register 12
Read signal
Output latch
Alternate
function
PM120
PU120
(P120)
PM12
PU12
Figure 4-15. Block Diagram of P120
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16962EJ3V0UD
EV
DD
P-ch
P120/INTP0
87
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