7480 datasheet(2/98 Pages) RENESAS

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MITSUBISHI MICROCOMPUTERS

7480/7481 GROUP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

DESCRIPTION

The 7480/7481 group is the single-chip microcomputer adopting

the silicon gate CMOS process. In addition to its simple instruction

set, the ROM, RAM, and I/O addresses are placed in the same

memory space.

Having built-in serial I/O, A-D converter, and watchdog timer, this

single-chip microcomputer is useful for control of automobiles, of-

fice automation equipment and home electric appliances.

The 7480/7481 group includes multiple types which differ in the

memory type, size, and package.

FEATURES

qNumber of basic machine language instructions ..................... 71

qMinimum instruction execution time ................................... 0.5 µs

(at 8 MHz clock input oscillation frequency)

qMemory size ROM ........................................... 4 K to 16 K bytes

RAM ............................................ 128 to 448 bytes

qProgrammable I/O ports .................................... 18 (7480 group)

(P0, P1, P4, P5)

24 (7481 group)

qInput ports ............................................................ 8 (7480 group)

(P2, P3)

12 (7481 group)

qBuilt-in programmable pull-up transistors (P0, P1)

qBuilt-in clamp diodes ............................................ 2 (7480 group)

(P4, P5)

8 (7481 group)

qInterrupt ................................................... 14 sources, 13 vectors

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

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

qSerial I/O ....................... 8-bit x 1 (UART or clock-synchronized)

qA-D converter ............................ 8-bit x 4 channels (7480 group)

8-bit x 8 channels (7481 group)

qBuilt-in watchdog timer

qPower source voltage ................................................ 2.7 to 4.5 V

(at [2.2 VCC-2] MHz clock input oscillation frequency)

4.5 to 5.5 V

(at 8 MHz clock input oscillation frequency)

qPower dissipation .............................................................. 35 mW

(at 8 MHz clock input oscillation frequency and 5 V power

source voltage)

APPLICATIONS

Automobiles, office automation equipment, home electric appli-

ances, etc.

Fig. 1 Pin configuration (top view)

PRELIMINAR

Notice:

This

is not

a final

specification.

Some

parametric

limits

are

subject

to change.

P17/SRDY

P16/SCLK

P15/TXD

P14/RXD

P13/T1

P12/T0

P11

P10

P23/IN3

P22/IN2

P21/IN1

P20/IN0

VREF

XIN

XOUT

VSS

P07

P06

P05

P04

P03

P02

P01

P00

P41/CNTR1

P40/CNTR0

P33

P32

P31/INT1

P30/INT0

RESET

VCC

Outline 32P4B