M38747 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M38747

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3874 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

DESCRIPTION

The 3874 group is the 8-bit microcomputer based on the 740 fam-

ily core technology.

The 3874 group includes data link layer communication control cir-

cuit, A-D converters, D-A converter, automatic data transfer serial

I/O, UART, and watchdog timer etc.

The various microcomputers in the 3874 group include variations

of internal memory size and packaging. For details, refer to the

section on part numbering.

For details on availability of microcomputers in the 3874 group, re-

fer to the section on group expansion.

FEATURES

qBasic machine-language instructions ...................................... 71

qMinimum instruction execution time ................................. 0.32 µs

(at 6.4 MHz oscillation frequency, in double-speed mode)

qMemory size

ROM ............................................................... 16 K to 60 K bytes

RAM ............................................................... 1024 to 2048 bytes

qProgrammable input/output ports ............................................ 72

qInput port .................................................................................... 1

qInterrupts ................................................. 27 sources, 16 vectors

(Interrupt source discrimination register exists, included key in-

put interrupt)

qTimer 1, timer 2, timer 3 ................................................. 8-bit ! 3

qTimer X, timer Y............................................................ 16-bit ! 2

qSerial I/O1 .................... 8-bit ! 1(UART or Clock-synchronized)

qSerial I/O2 ................................... 8-bit ! 1(Clock-synchronized)

qSerial I/O3 ...................................................................... 8-bit ! 1

(Clock-synchronized automatic data transfer/arbitrary bit trans-

fer function available)

qA-D converter ................................................. 8-bit ! 8 channels

qD-A converter ................................................... 8-bit ! 1 channel

qData link layer communication control circuit ............................ 1

qClock generating circuit ..................................... Built-in 2 circuits

(connect to external ceramic resonator or quartz-crystal oscillator)

qWatchdog timer ............................................................ 20-bit ! 1

qPower source voltage ................................................ 3.0 to 5.5 V

qPower dissipation

In double-speed mode ...................................................... 90 mW

In high-speed mode .......................................................... 60 mW

(at 32 kHz oscillation frequency, at 5 V power source voltage)

In low-speed mode .......................................................... 180 µW

(at 32 kHz oscillation frequency, at 3 V power source voltage)

qOperating temperature range .................................... –40 to 85°C

(Extended operating temperature version and automotive ver-

sion)

APPLICATION

Automotive comfort control for audio system, air conditioning etc.,

automotive body electronics control, household appliances, and

other consumer applications, etc.

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