M34280E1FP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M34280E1FP

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4280 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

PERFORMANCE OVERVIEW

Parameter

Function

Number of basic instructions

62

Minimum instruction execution time 8.0 µs (at 4.0 MHz system clock frequency)

(f(XIN) = 4.0 MHz, system clock = f(XIN)/8, VDD = 3 V)

Memory sizes ROM M34280M1/ 1024 words ! 9 bits

RAM E1

32 words ! 4 bits

Input/Output D0–D6 Output Seven independent output ports

ports

D7

I/O

1-bit I/O port with the pull-down function

E0–E2 Input

3-bit input port with the pull-down function

E0, E1 Output 2-bit output port (E0, E1)

G0–G3 I/O

4-bit I/O port with the pull-down function

CARR Output 1-bit output port; CMOS output

Timer 1

8-bit timer with a reload register

Subroutine nesting

4 levels (However, only 3 levels can be used when the TABP p instruction is executed)

Device structure

CMOS silicon gate

Package

20-pin plastic molded SOP (20P2N-A)/SSOP (20P2E/F-A)

Operating temperature range

–20 °C to 85 °C

Supply voltage

1.8 V to 3.6 V

Power

Active mode

400 µA

dissipation

(f(XIN) = 4.0 MHz, system clock = f(XIN)/8, VDD = 3 V)

(typical value) RAM back-up mode 0.1 µA (at room temperature, VDD = 3 V)

PIN DESCRIPTION

Pin

Name

VDD

Power supply

VSS

Ground

XIN

System clock input

XOUT

System clock output

D0–D6

Output port D

D7

I/O port D

E0–E2

I/O port E

G0–G3

I/O port G

CARR

Carrier wave output

for remote control

Input/Output

—

—

Input

Output

Output

I/O

Output

Input

I/O

Output

Function

Connected to a plus power supply.

Connected to a 0 V power supply.

I/O pins of the system clock generating circuit. Connect a ceramic resonator

between pins XIN and XOUT. The feedback resistor is built-in between pins XIN

and XOUT.

Each pin of port D has an independent 1-bit wide output function. The output

structure is P-channel open-drain.

1-bit I/O port. For input use, turn on the built-in pull-down transistor and set the

latch of the specified bit to “0.” In addition, key-on wakeup function using “H”

level sense becomes valid. The output structure is P-channel open-drain.

2-bit (E0, E1) output port. The output structure is P-channel open-drain.

3-bit input port. For input use (E0, E1), turn on the built-in pull-down transistor and

set the latch of the specified bit to “0.” In addition, key-on wakeup function using

“H” level sense becomes valid. Port E2 has an input-only port and has a key-on

wakeup function using “H” level sense and pull-down transistor.

4-bit I/O port. For input use, set the latch of the specified bit to “0.” The output

structure is P-channel open-drain. Port G has a key-on wakeup function using

“H” level sense and pull-down transistor.

Carrier wave output pin for remote control. The output structure is CMOS circuit.

MITSUBISHI

ELECTRIC

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