ST72141K datasheet(5/132 Pages) STMICROELECTRONICS

5 / 132 page

ST72141K

5/132

1 GENERAL DESCRIPTION

1.1 INTRODUCTION

The ST72141K devices are members of the ST7

microcontroller family designed specifically for mo-

tor control applications and including A/D conver-

sion and SPI interface capabilities. They include

an on-chip Moter Controller peripheral for control

of electric brushless moters with or without sen-

sors. An example application, for 6-step control of

a Permanent Magnet DC motor, is shown in Figure

The ST72141K devices are based on a common

industry-standard 8-bit core, featuring an en-

hanced instruction set.

Under software control, they can be placed in

WAIT, SLOW, or HALT mode, reducing power

consumption when the application is in idle or

standby state.

The enhanced instruction set and addressing

modes of the ST7 offer both power and flexibility to

software developers, enabling the design of highly

efficient and compact application code. In addition

to standard 8-bit data management, all ST7 micro-

controllers feature true bit manipulation, 8x8 un-

signed multiplication and

indirect addressing

modes.

Figure 1. Example of a 6-step-controlled Motor

Figure 2. Device Block Diagram

Net

Step

300V

150V

300V

150V

300V

150V

ST7

MTC

MCO5-0

MCIB

MCIA

MCIC

8-BIT CORE

ALU

OSC1

OSC2

RESET

MOTOR CTRL

TIMER B

TIMER A

PORT B

WATCHDOG

MCO5:0

OSC

Internal

CLOCK

CONTROL

256b-RAM

PA7:0

VSS

VDD

POWER

SUPPLY

8K-EPROM

PORT A

8-BIT ADC

SPI

OC1A

MCIA:C

MCES

MCCFI

PB5:0

DIV

LVD

(6-BIT)

(8-BIT)

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