M38000E2-XXXSS データシートの表示（PDF） - MITSUBISHI ELECTRIC

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M38000E2-XXXSS

8-BIT SINGLE-CHIP MICROCOMPUTER

MITSUBISHI ELECTRIC  

HARDWARE

PIN DESCRIPTION

PIN DESCRIPTION

Table 1. Pin description

Pin

Name

VCC

VSS

CNVSS

Power source

CNVSS

RESET

XIN

Reset input

Clock input

XOUT

Clock output

P00 – P07 I/O port P0

P10 – P17 I/O port P1

P20 – P27 I/O port P2

P30 – P37 I/O port P3

P40, P41

I/O port P4

P42/INT0,

P43/INT1

P44/RXD,

P45/TXD,

P46/SCLK,

P47/SRDY

P50/INT2 – I/O port P5

P53/INT5

P54/CNTR0,

P55/CNTR1

P56, P57

Function

Function except a port function

• Apply voltage of 3.0 V to 5.5 V to VCC, and 0 V to VSS.

(Extended operating temperature version : 4.0 V to 5.5 V)

• This pin controls the operation mode of the chip.

• Normally connected to VSS.

• If this pin is connected to VCC, the internal ROM is inhibited and external memory is accessed.

• Reset input pin for active “L”

• Input and output signals for the internal clock generating circuit.

• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the

oscillation frequency.

• If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.

• The clock is used as the oscillating source of system clock.

• 8 bit CMOS I/O port

• I/O direction register allows each pin to be individually programmed as either input or output.

• At reset this port is set to input mode.

• In modes other than single-chip, these pins are used as address, data, and control bus I/O pins.

• CMOS compatible input level

• CMOS 3-state output structure

• 8-bit CMOS I/O port with the same function as port P0

• CMOS compatible input level

• CMOS 3-state output structure

• External interrupt input pins

• Serial I/O I/O pins

• 8-bit CMOS I/O port with the same function as

port P0

• CMOS compatible input level

• CMOS 3-state output structure

• External interrupt input pins

• Timer X and Timer Y I/O pins

P60 – P67 I/O port P6

P70, P71

I/O port P7

• 8-bit CMOS I/O port with the same function as port P0

• CMOS compatible input level

• CMOS 3-state output structure

• 2-bit CMOS I/O port with the same function as port P0

• CMOS compatible input level

• CMOS 3-state output structure

3800 GROUP USER’S MANUAL

1-5

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