ST7FLITE20 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7FLITE20

8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

STMicroelectronics 

Prev 51 52 53 54 55 56 57 58 59 60 Next

ST7LITE2

11.2 12-BIT AUTORELOAD TIMER 2 (AT2)

11.2.1 Introduction

The 12-bit Autoreload Timer can be used for gen-

eral-purpose timing functions. It is based on a free-

running 12-bit upcounter with an input capture reg-

ister and four PWM output channels. There are 6

external pins:

– Four PWM outputs

– ATIC pin for the Input Capture function

– BREAK pin for forcing a break condition on the

PWM outputs

11.2.2 Main Features

■ 12-bit upcounter with 12-bit autoreload register

(ATR)

Figure 34. Block Diagram

■ Maskable overflow interrupt

■ Generation of four independent PWMx signals

■ Frequency 2KHz-4MHz (@ 8 MHz fCPU)

– Programmable duty-cycles

– Polarity control

– Programmable output modes

– Maskable Compare interrupt

■ Input Capture

– 12-bit input capture register (ATICR)

– Triggered by rising and falling edges

– Maskable IC interrupt

ATIC

12-BIT INPUT CAPTURE REGISTER

ATICR

IC INTERRUPT

REQUEST

ATCSR

OVF INTERRUPT

REQUEST

fLTIMER

(1 ms

timebase

@ 8MHz)

fCPU

32 MHz

0 ICF ICIE CK1 CK0 OVF OVFIE CMPIE

fCOUNTER

CNTR

CMPF0

CMPF1

CMPF2

CMPF3

12-BIT UPCOUNTER

CMP

INTERRUPT

REQUEST

12-BIT AUTORELOAD REGISTER

ATR

DCR0H

Preload

DCR0L

Preload

on OVF Event

IF TRAN=1

12-BIT DUTY CYCLE VALUE (shadow)

4 PWM Channels

CMPFx bit

COMP-

PARE

OEx bit

OPx bit

fPWM POL-

ARITY

PWMx

55/133

1

Share Link: