Overview Of I/O Ports; Functions Of I/O Ports - Fujitsu F2MC-8L F202RA Hardware Manual

CHAPTER 4 I/O PORTS
4.1

Overview of I/O Ports

Six I/O ports (comprising 26 pins) are available as general-purpose I/O ports (parallel I/O
ports).
These ports also serve peripherals (as I/O pins for specific peripheral functions).
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Functions of I/O Ports

The I/O ports function to output data from the CPU to I/O pins via their port data register (PDR) and send
signals input to I/O pins to the CPU. For some ports, the I/O direction of I/O pins can be set by optionally
setting the bits of the port data direction register (DDR), with the bits corresponding to the pins.
The functions of the ports and peripherals for which the ports may serve are summarized below.
• Port 0: General-purpose I/O port may also serve peripherals (external interrupt 2 and analog input pins)
• Port 3: General-purpose I/O port may also serve peripherals (12-bit PPG, external interrupt 1, UART, 8-
• Port 4: General-purpose I/O port of a type switched between CMOS push-pull and N-ch open-drain may
• Port 5: General-purpose I/O port may also serve peripherals (8-bit PWM pin)
• Port 6: General-purpose I/O port (for MB89F202/F202RA, P61, P60 are input port)
• Port 7: General-purpose I/O port
Table 4.1-1 lists the functions of the ports, and Table 4.1-2 lists the register of ports.
Table 4.1-1 Functions of Ports
Port
Pin name
name
P00/INT20/
Port 0 AN4 to
P07/INT27
P30/UCK/SCK
Port 3 to
P37/BZ/PPG
P40/AN0
Port 4 to
P43/AN3
Port 5 P50/PWM
P60,
Port 6
P61
Port 7 P70
to
P72
76
bit serial I/O, 8/16-bit timers, and buzzer output pin)
also serve peripherals (analog input pins)
Input Output
bit7
form form
P07
Hysteresis
CMOS
INT27
analog
CMOS
push-pull
P37
CMOS
BZ/
hysteresis
PPG
CMOS
CMOS push-pull
analog or N-ch
open-drain
CMOS CMOS
hysteresis push-pull
CMOS
CMOS push-pull
hysteresis or N-ch
open-drain
CMOS CMOS
bit6 bit5 bit4
P06 P05 P04
INT26 INT25 INT24
P36 P35 P34
TO/
INT12 INT11
INT10
- - -
- - -
- - -
- - -
bit3 bit2 bit1
P03 P02
AN7 AN6 AN5
INT23 INT22 INT21
P33 P32
EC UI/SI UO/SO
P43 P42
-
AN3 AN2 AN1
- - -
- - -
- - P72
bit0
P01 P00
AN4
INT20
P31 P30
UCK/
SCK
P41 P40
AN0
P50
-
PWM
P61 P60
- -
P71 P70