LC87F0808AUQFPTLM-H Datasheet, PDF (10/25 Pages) ON Semiconductor – 8-bit 1-chip Microcontroller

LC87F0808A
Continued from preceding page.
Pin Name
I/O
Description
Port 7
P70 to P73
I/O
• 4-bit I/O port
• I/O specifiable in 1-bit units
• Pull-up resistors can be turned on and off in 1-bit units.
• Pin functions
P70: INT0 input/HOLD reset input/timer 0L capture input
P71: INT1 input/HOLD reset input/timer 0H capture input
P72: INT2 input/HOLD reset input/timer 0 event input / timer 0L capture input
P73: INT3 input (with noise filter)/ timer 0 event input/timer 0H capture input
Interrupt acknowledge types
Rising
Falling
Rising &
Falling
H level
INT0
enable
enable
disable
enable
INT1
enable
enable
disable
enable
INT2
enable
enable
enable
disable
INT3
enable
enable
enable
disable
OWP0
RES
CF1/XT1
CF2/XT2
I/O
On-chip debugger (exclusive pin)
I/O
External reset input/internal reset output
I
• Ceramic resonator or 32.768kHz crystal oscillator input pin
• Pin function
General-purpose input port
I/O
• Ceramic resonator or 32.768kHz crystal oscillator output pin
• Pin function
General-purpose input port
L level
enable
enable
disable
disable
Option
No
No
No
No
No
Port Output Types
The table below lists the types of port outputs and the presence/absence of a pull-up resistor.
Data can be read into any input port even if it is in the output mode.
Port Name
P00 to P07
Option selected in
units of
1 bit
Option type
1
CMOS
Output type
Pull-up resistor
Programmable (Note 1)
2
Nch-open drain
No
P10 to P17
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
P20 to P21
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
P30 to P35
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
P70 to P73
-
No
CMOS
Programmable
Note 1: The control of the presence or absence of the programmable pull-up resistors for port 0 and the switching
between low-and high-impedance pull-up connection is exercised in nibble (4-bit) units (P00 to 03 or
P04 to 07).
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