7540 datasheet(21/366 Pages) RENESAS

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REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

HARDWARE

7540 Group

DESCRIPTION

The 7540 Group is the 8-bit microcomputer based on the 740 fam-

ily core technology.

The 7540 Group has a serial I/O, 8-bit timers, a 16-bit timer, and

an A/D converter, and is useful for control of home electric appli-

ances and office automation equipment.

FEATURES

•

Basic machine-language instructions ...................................... 71

•

The minimum instruction execution time ......................... 0.34

µs

(at 6 MHz oscillation frequency, double-speed mode for the

shortest instruction)

•

Memory size ROM ............................................ 8 K to 32 K bytes

RAM ............................................. 384 to 768 bytes

•

Programmable I/O ports ....................... 29 (25 in 32-pin version)

•

Interrupts ................................................. 15 sources, 15 vectors

................................. (14 sources, 14 vectors for 32-pin version)

•

Timers ............................................................................. 8-bit ✕ 4

...................................................................................... 16-bit ✕ 1

•

Serial I/O1 ................... 8-bit ✕ 1 (UART or Clock-synchronized)

•

Serial I/O2 (Note 1) ..................... 8-bit ✕ 1 (Clock-synchronized)

•

A/D converter ............................................... 10-bit ✕ 8 channels

.................................................... (6 channels for 32-pin version)

•

Clock generating circuit ............................................. Built-in type

(low-power dissipation by an on-chip oscillator enabled)

(connect to external ceramic resonator or quartz-crystal oscilla-

tor permitting RC oscillation)

•

Watchdog timer ............................................................ 16-bit ✕ 1

•

Power source voltage

XIN oscillation frequency at ceramic oscillation, in double-speed mode

At 6 MHz .................................................................... 4.5 to 5.5 V

XIN oscillation frequency at ceramic oscillation, in high-speed mode

At 8 MHz .................................................................... 4.0 to 5.5 V

At 4 MHz .................................................................... 2.4 to 5.5 V

At 2 MHz .................................................................... 2.2 to 5.5 V

XIN oscillation frequency at RC oscillation in high-speed mode or

middle-speed mode

At 4 MHz .................................................................... 4.0 to 5.5 V

At 2 MHz .................................................................... 2.4 to 5.5 V

At 1 MHz .................................................................... 2.2 to 5.5 V

•

Power dissipation

Mask ROM version ....................................... 22.5 mW (standard)

One Time PROM version ................................ 30 mW (standard)

•

Operating temperature range ................................... –20 to 85 °C

(–40 to 85 °C for extended operating temperature version)

(–40 to 125 °C for extended operating temperature 125 °C ver-

sion (Note 2))

APPLICATION

Office automation equipment, factory automation equipment,

home electric appliances, consumer electronics, car, etc.

Notes 1: Serial I/O2 can be used in the following cases;

(1) Serial I/O1 is not used,

(2) Serial I/O1 is used as UART and BRG output divided by 16 is

selected as the synchronized clock.

2: In this version, the operating temperature range and total time

are limited as follows;

55 °C to 85 °C: within total 6000 hours,

85 °C to 125 °C: within total 1000 hours.

DESCRIPTION/FEATURES/APPLICATION

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