STR71XF datasheet(5/49 Pages) STMICROELECTRONICS

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STR71xF - INTRODUCTION

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Standard Timers

Each of the four timers have a 16-bit free-running counter with 7-bit prescaler, up to two input

capture/output compare functions, a pulse counter function, and a PWM channel with

selectable frequency.

Realtime Clock (RTC)

The RTC provides a set of continuously running counters driven by a low power 32kHz

internal oscillator. The RTC can be used as a general timebase or clock/calendar/alarm

function. When the STR71xF is in Standby mode the RTC can be kept running, powered by

the low power voltage regulator and driven by the 32kHz internal oscillator.

UARTs

The 4 UARTs allow full duplex, asynchronous, communications with external devices with

independently programmable TX and RX baud rates up to 625 kb/s.

Smart Card Interface

UART1 is configurable to function either as a general purpose UART or as an asynchronous

Smart Card interface as defined by ISO 7816-3. It includes Smart Card clock generation and

provides support features for synchronous cards.

Buffered Serial Peripheral Interfaces (BSPI)

Each of the two SPIs allow full duplex, synchronous communications with external devices,

master or slave communication at up to 5.5Mb/s in Master mode and 4 Mb/s in Slave mode.

I2C Interfaces

The two I2C Interfaces provide multi-master and slave functions, support normal and fast I2C

mode (400 kHz) and 7 or 10-bit addressing modes.

One I2C Interface is multiplexed with one SPI, so either 2xSPI+1x I2C or 1xSPI+2x I2C may be

used at a time.

HDLC interface

The High Level Data Link Controller (HDLC) unit supports full duplex operation and NRZ,

NRZI, FM0 or MANCHESTER protocols. It has an internal 8-bit baud rate generator.

A/D Converter

The Analog to Digital Converter, converts in single channel or up to 4 channels in single-shot

or continuous conversion modes. Resolution is 12-bit with a sample rate of 0.5 kHz (1 kHz in

single channel mode). The input voltage range is 0-2.5V.

STR71XF 数据表(PDF) 5 Page - STMicroelectronics