MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 4 List of I/O port function (1)
Name
Input/Output
Non-Port Function
Pin
I/O Format
Related SFRs
Diagram No.
(1)
P00/SEG26–
P07/SEG33
Port P0
Input/output,
byte unit
CMOS compatible
input level
LCD segment output
PULL register A
Segment output enable
register
(2)
CMOS 3-state output
P10/SEG34–
P15/SEG39
Port P1
Input/output,
6-bit unit
CMOS compatible
input level
LCD segment output
PULL register A
(1)
(2)
Segment output enable
register
CMOS 3-state output
Input/output,
individual bits
CMOS compatible
input level
PULL register A
P16 , P17
P20–P27
(4)
(4)
(3)
CMOS 3-state output
Port P2
Port P3
Input/output,
individual bits
CMOS compatible
input level
Key input (key-on
wake-up) interrupt
input
PULL register A
Interrupt control register2
Key input control register
PULL register A
CMOS 3-state output
P30/SEG18–
P37/SEG25
Output
CMOS 3-state output
LCD segment output
Segment output enable
register
P3 output enable register
A-D control register
CMOS compatible
input level
(13)
P40/ADT
Port P4
Input/output,
individual bits
A-D trigger input
External interrupt input
Interrupt edge selection
register
N-channel open-drain
output
CMOS compatible
input level
External interrupt input
PULL register B
(4)
P41/INT1,
P42/INT2
Interrupt edge selection
register
CMOS 3-state output
P43/φ/TOUT
Timer output φ output
(12)
PULL register B
Timer 123 mode register
TOUT/φ output control
register
P44/RXD,
P45/TXD,
P46/SCLK1,
P47/SRDY1
Serial I/O1 function I/O
(5)
(6)
PULL register B
Serial I/O1 control register
Serial I/O1 status register
UART control register
PULL register B
(7)
(8)
P50/PWM0,
P51/PWM1
Port P5
Input/output,
individual bits
CMOS compatible
input level
PWM output
(10)
PWM control register
CMOS 3-state output
P52/RTP0,
P53/RTP1
Real time port
function output
PULL register B
(9)
Timer X mode register
P54/CNTR0
P55/CNTR1
P56/DA1
PULL register B
(11)
(14)
(15)
Timer X function I/O
TimerY function input
Timer X mode register
PULL register B
TimerY mode register
DA1 output
PULL register B
A-D VREF input
D-A control register
A-D control register
PULL register B
P57/DA2
DA2 output
(15)
D-A control register
12
MITSUBISHI [ Mitsubishi Group ]
