ST7260 datasheet(4/117 Pages) STMICROELECTRONICS

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ST7260

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1 INTRODUCTION

The ST7260 Microcontrollers form a sub-family of

the ST7 MCUs dedicated to USB applications. The

devices are based on an industry-standard 8-bit

core and feature an enhanced instruction set.

They operate at a 24 MHz or 12 MHz oscillator fre-

quency. Under software control, the ST7260

MCUs may be placed in either Wait or Halt modes,

thus reducing power consumption. The enhanced

instruction set and addressing modes afford real

programming potential. In addition to standard 8-

bit data management, the ST7260 MCUs feature

true bit manipulation, 8x8 unsigned multiplication

and indirect addressing modes. The devices in-

clude an ST7 Core, up to 8Kbytes of program

memory, up to 384 bytes of RAM, 19 I/O lines and

the following on-chip peripherals:

– USB low speed interface with 3 endpoints with

programmable in/out configuration using the

DMA architecture with embedded 3.3V voltage

regulator and transceivers (no external compo-

nents are needed).

– Industry standard asynchronous SCI serial inter-

face

– Watchdog

– 16-bit Timer featuring an External clock input, 2

Input Captures, 2 Output Compares with Pulse

Generator capabilities

– Low voltage reset (LVD) ensuring proper power-

on or power-off of the device

The ST72F60 devices are Flash versions. They

support programming in IAP mode (In-application

programming) via the on-chip USB interface.

Figure 1. General Block Diagram

8-BIT CORE

ALU

OSCIN

OSCOUT

RESET

PORT B

16-BIT TIMER

PORT A

PORT C

PB[7:0]

(8 bits)

PC[2:0]

(3 bits)

OSCILLATOR

INTERNAL

CLOCK

CONTROL

RAM

(384 Bytes)

PA[7:0]

(8 bits)

VSS

VDD

POWER

SUPPLY

SCI

PROGRAM

(8K Bytes)

MEMORY

(UART)

USB SIE

OSC/3

LVD

WATCHDOG

VSSA

VDDA

VPP/TEST

USB DMA

USBDP

USBDM

USBVCC

OSC/4 or OSC/2

for USB1)

1) 12 or 24 MHz OSCIN frequency required to generate 6 MHz USB clock.

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