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DS80C320-ENG 데이터시트(PDF) 36 Page - Dallas Semiconductor

부품명 DS80C320-ENG
상세설명  High-Speed Microcontroller User Guide
PDF  175 Pages
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제조업체  DALLAS [Dallas Semiconductor]
홈페이지  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS80C320-ENG 데이터시트(HTML) 36 Page - Dallas Semiconductor

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High-Speed Microcontroller User’s Guide
36 of 175
Port 3 (P3)
7
6
5
4
3
2
1
0
SFR B0h
P3.7
RD
P3.6
WR
P3.5
T1
P3.4
T0
P3.3
1
INT
P3.2
0
INT
P3.1
TXD0
P3.0
RXD0
RW-1
RW-1
RW-1
RW-1
RW-1
RW-1
RW-1
RW-1
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
P3.7-0
Bits 7-0
Purpose I/O Port 3. This register functions as a general purpose I/O port. In
addition, all the pins have an alternative function listed below. Each of the
functions is controlled by several other SFRs. The associated Port 1 latch bit
must contain a logic one before the pin can be used in its alternate function
capacity.
RD
Bit 7
External Data Memory Read Strobe. This pin provides an active low read
strobe to an external memory device.
WR
Bit 6
External Data Memory Write Strobe. This pin provides an active low write
strobe to an external memory device.
T1
Bit 5
Timer/Counter External Input. A 1 to 0 transition on this pin will increment
Timer 1.
T0
Bit 4
Counter External Input. A 1 to 0 transition on this pin will increment Timer 0.
INT1
Bit 3
External Interrupt 1.
A falling edge/low level on this pin will cause an
external interrupt 1 if enabled.
INT0
Bit 2
External Interrupt 0.
A falling edge/low level on this pin will cause an
external interrupt 0 if enabled.
TXD0
Bit 1
Serial Port 0 Transmit. This pin transmits the serial port 0 data in serial port
modes 1, 2, 3 and emits the synchronizing clock in serial port mode 0.
RXD0
Bit 0
Serial Port 0 Receive. This pin receives the serial port 0 data in serial port
modes 1, 2, 3 and is a bi-directional data transfer pin in serial port mode 0.



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