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M38C21F1DHP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

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MITSUBISHI MICROCOMPUTERS

38C2 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Table 6 List of I/O port function

Pin

Name Input/Output

I/O format

Non-port function

Related SFRs

Ref. No.

P00/SEG0 –

Port P0 Input/Output, CMOS compatible LCD segment Key input

Segment output disable

(1)

P03/SEG3

individual bits input level

output

(key-on wakeup) register 1

CMOS 3-state output

interrupt input

P04/SEG4 –

(2)

P07/SEG7

P10/SEG8 –

Port P1 Input/Output, CMOS compatible

Segment output disable

P17/SEG15

individual bits input level

register 2

CMOS 3-state output

P20/SEG16 –

Port P2 Input/Output, CMOS compatible

Segment output disable

P25/SEG21

individual bits input level

register 3

P26/SEG22/VL1

CMOS 3-state output

LCD power

P27/SEG23/VL2

input

P30/SRDY2

Port P3 Input/Output, CMOS compatible Serial I/O2 function I/O

PULL register

(3)

P31/SCLK2

individual bits input level

Serial I/O2 control register (4)

P32/TxD2

CMOS 3-state output

Serial I/O2 status register (5)

P33/RxD2

UART2 control register

(6)

P34/INT2

External interrupt input

PULL register

(7)

Interrupt edge selection

register

P35/TXOUT

Timer X output

PULL register

(8)

P36/T2OUT/φ

Timer 2 output

Timer X mode register

(9)

Timer 12 mode register

P37/CNTR0

Timer X function input

PULL register

(7)

Timer X mode register

P40/OOUT0/AN0 Port P4 Input/Output, CMOS compatible A-D conversion Oscillation PULL register

(11)

P41/OOUT1/AN1

individual bits input level

input

external

A-D control register

CMOS 3-state output

output

P42/AN2–

(10)

P45/AN5

P46/RTP0/AN6

Real time PULL register

(11)

P47/RTP1/AN7

port function A-D control register

output

Timer Y mode register

P50/INT0

Port P5 Input/Output, CMOS compatible External interrupt input

PULL register

(7)

P51/INT1

individual bits input level

Interrupt edge selection

CMOS 3-state output

register

P52/T3OUT/PWM0

Timer 3 output

PULL register

(9)

P53/T4OUT/PWM1

Timer 4 output

Timer 12 mode register

PWM output

P54/RxD1

Serial I/O1 Key input PULL register

(12)

P55/TxD1

function I/O (key-on wakeup) Serial I/O1 control register (13)

P56/SCLK1

interrupt input Serial I/O1 status register (14)

P57/SRDY1

UART1 control register

(15)

P60/CNTR1

Port P6 Input/Output, CMOS compatible Timer Y function input

PULL register

(7)

individual bits input level

Timer Y mode register

P61/XCIN

CMOS 3-state output Sub-clock oscillation circuit PULL register

(16)

P62/XCOUT

CPU mode register

(17)

COM0–COM3

Common Output

LCD common output

LCD mode register

(18)

Notes 1: For details of how to use double/triple function ports as function I/O ports, refer to the applicable sections.

2: Make sure that the input level at each pin is either 0 V or VCC during execution of the STP instruction.

When an input level is at an intermediate potential, a current will flow from VCC to VSS through the input-stage gate.

14

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