STR720-EVAL datasheet(5/32 Pages) STMICROELECTRONICS

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STR720-EVAL

1 Introduction

4/31

●

Clocking:

–

+3.3 V surface mounted 16 MHz oscillator provides the main clock source,

–

RTC real-time clock with embedded 32 KHz oscillator.

●

Serial ROM. A 1-Mbit SPI serial flash connected to the buffered serial peripheral interface

(BSPI): IC20.

1.2

Board interface connections

Diagrams and wiring descriptions for these connectors are provided in

Section 4 on page 18.

The following connections are supported by the board:

●

USB support USB device using a type B connector: CN8,

●

CAN uses a single 9 D-type connector with microswitch selectable low or high speed

transceiver: CN7,

●

UART1 (Rx and Tx only) connected to a 9-way male D-type RS232 connector: CN5,

●

UART2 (Rx and Tx only) connected to a 9-way male D-type RS232 connector: CN6,

●

JTAG, 20 pin IDC connector: CN2,

●

variable resistor voltage range 0 to 2.5 V: VR1,

●

LM35 temperature sensor: IC4,

●

prototype area: GD1,

●

test points various test points are located throughout the board, for details see

Section 4.1

on page 18,

●

main power supply: CN1.

1.3

Push buttons

The following push buttons are provided, they are described further in

Section 2.13 on page 10:

●

reset (RST), board reset: SW1,

●

previous (PRV), programmable switch: SW8,

●

next (NXT), programmable switch: SW9,

●

select (SEL), programmable switch: SW10,

●

RTC reset (RTCRST): SW11.

1.4

Displays

The following LCD and LEDs are provided:

●

LCD write-only display, 2x16 LCD display connected to the EMI using a buffer and address

decode logic, green back light display: LCD1,

●

surface mount red +5 V and +3.3 V power indicators: LD1, LD2,

●

surface mount yellow, IDE ATAPI +3.3 V power indicator: LD3,

●

surface mount yellow, USB connection indicator: LD18,

●

bi-color red/green, reset indicator: LD4,

●

low consumption LEDs red: LD5, LD6, LD7, LD8, LD9, LD10, LD11, LD12, LD13, LD14,

LD15, LD16, LD17.

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