upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 77
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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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4.2.2 Port 1
using port mode register 1 (PM1). When the P10 to P17 pins are used as an input port, use of an on-chip pull-up
resistor can be specified 1-bit units by pull-up resistor option register 1 (PU1).
flash memory programming mode setting.
Port 1 is an 8-bit I/O port with an output latch. Port 1 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, timer I/O, and
RESET input sets port 1 to input mode.
Figures 4-5 to 4-9 show block diagrams of port 1.
Caution When P10/SCK10/TxD0, P11/SI10/RxD0, and P12/SO10 are used as general-purpose ports, set
WR
WR
PU1:
PM1:
RD:
WR××: Write signal
WR
RD
PORT
PU
PM
serial operation mode register 10 (CSIM10) and serial clock selection register 10 (CSIC10) to the
default status (00H).
Pull-up resistor option register 1
Port mode register 1
Read signal
Output latch
Alternate
Alternate
function
function
PM10
PU10
(P10)
PM1
PU1
Figure 4-5. Block Diagram of P10
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16962EJ3V0UD
EV
DD
P-ch
P10/SCK10/TxD0
77
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