Atmel AT89RFD-08, Руководство пользователя, Страница: 2 / 36

AT89RFD-08 Hardware User Guide 1
4382E–MP3–05/06
Section 1
Introduction ........................................................................................... 1-1
1.1 Overview ...................................................................................................1-1
1.1.1 Typical Applications ............................................................................1-1
1.2 AT89RFD-08 Reference Design Features ................................................1-4
Section 2
Using the AT89RFD-08 Board ............................................................. 2-7
2.1 Block Diagram...........................................................................................2-7
2.2 Power Supply ............................................................................................2-8
2.2.1 5V to 9V power Supply .......................................................................2-8
2.2.2 3V power Supply ................................................................................2-8
2.2.3 Power Supply Source Connection ......................................................2-9
2.2.4 “POWER“ LED....................................................................................2-9
2.3 AT89C51SND2C MP3 microcontroller....................................................2-10
2.3.1 Reset ................................................................................................2-10
2.3.2 CPU Clock ........................................................................................2-11
2.3.3 PLL Filter ..........................................................................................2-11
2.4 Communication Interfaces ......................................................................2-12
2.4.1 RS-232 .............................................................................................2-12
2.4.2 USB ..................................................................................................2-12
2.4.3 SPI....................................................................................................2-13
2.4.4 TWI ...................................................................................................2-14
2.5 On-board Resources...............................................................................2-15
2.5.1 LEDs.................................................................................................2-15
2.5.2 2-key Keypad....................................................................................2-15
2.5.3 Secure Digital (SD) / MultiMedia Card (MMC) Area .........................2-15
2.6 Audio Interfaces ......................................................................................2-16
2.6.1 Speaker 8 Ohms Output...................................................................2-16
2.6.2 Earphone 32 Ohms Output...............................................................2-16
2.7 Expansion Connector..............................................................................2-17
2.7.1 Nand Flash connection.....................................................................2-17
2.8 In-System Programming .........................................................................2-18
2.8.1 ISP Programming .............................................................................2-18
2.8.2 ISP Using Hardware Conditions .......................................................2-18
2.8.3 ISP Using Software Condition ..........................................................2-18
2.9 Electrical Parameter Measurement.........................................................2-19
2.9.1 Configuration Pad.............................................................................2-19
2.9.2 AT89C51SND2C Configuration Pads...............................................2-19