Daniel Imfeld Derrick Kwong Mark Hsu Mike Hu

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1 Daniel Imfeld Derrick Kwong Mark Hsu Mike Hu

2 Product Description The Encore features a MIDI synthesizer and a sequencer in a portable package. It has MIDI In, MIDI Out and MIDI Thru ports to facilitate a full integration into a chain of MIDI instruments. The user interface consists of a 256x128 graphic LCD and a 16-key keypad. A compact flash port is also included for storage of recorded MIDI files and instrument definitions.

3 Applications Synthesizer The Encore acts as a multi-timbral synthesizer, and provides sound when hooked to a MIDI instrument. It supports flexible instrument definitions which allow such parameters as envelope variation, tremolo, vibrato, and LFO frequency modulation. The user can create new instrument definitions with ease. Direct digital synthesis methods allow more than 16 simultaneously active voices. Sequencer Recording of MIDI data is also made possible with the Encore. It allows simultaneous playback and recording of separate MIDI files. Storage The Encore supports standard CompactFlash media and the FAT file system. This allows the user to read/write data directly to the card more quickly than the MIDI interface. The user can simply drag and drop MIDI files to and from the card for playback and editing.

4 Specifications Controller Storage File System Polyphony Sample Rate Synthesis Waveform Synthesis Method Recording Time Ports LCD Required Voltage Atmel AT91RM9200 CompactFlash FAT 16 voices Hz Sine, Ramp, Square, Triangle, Sawtooth 4 to 6 operator FM Limited only by storage size. MIDI In, MIDI Out, MIDI Thru, Serial, Line-out, CompactFlash 256x128 Monochrome 7.5 Vdc

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7 Voltage Reg. MIDI Ports LCD Conn. -15V Generator SRAM Flash Test Connector MIDI In Optoisloator L E D s DIP Switches Keypad CPU CF Slot Reset Ctrl D/A OpAmp MAX232 Debug UART

8 Voltage Reg. MIDI Ports LCD Conn. -15V Generator SRAM Flash Test Connector MIDI In Optoisloator L E D s DIP Switches Keypad CPU CF Slot Reset Ctrl D/A OpAmp MAX232 Debug UART

9 Atmel AT91RM9200 Speed MHz Speed: 180 MHz, 200 MIPS Clock Source: 20 MHz Crystal and Internal Oscillation Circuitry + PLL KHz Crystal also required for peripherals Buses External Memory Interface 26 Address Bits, 32 Data Bits 8 Chip Selects Supports SDRAM, SRAM, Burst Flash Glueless Connection to CompactFlash and SmartMedia 3 Synchronous Serial Controllers 4 USARTS Parallel Programmable I/O SD Card/MMC Interface 10/100 Ethernet MAC 1 USB 2.0 Full Speed Host Port 1 USB 2.0 Full Speed Device Port SPI Two-Wire Interface

10 D/A Converter CompactFlash Flash SRAM MIDI LCD Keypad Sound Synthesis FAT File System Subsystems

11 D/A Converter Model: Texas Instruments PCM Wires - Frame Sync Clock, Bit Clock, Bit Data Voltage Levels: 3.3, 0 Bit Rate: MHz Frame Rate: Hz Framing: Left-Justified I2S format

12 Storage Internal Memory 16 KB of RAM 128 KB Boot ROM with simple bootloader, service code, sine and CRC tables External Memory 512KB (256Kx16) Flash Memory AT49BV4096A-90TC 128 KB (64Kx16) SRAM CY7C1021CV33-10ZC CompactFlash

13 Memory Flash Memory The Flash memory which stores the program code sits on the bus, and can be read like a standard SRAM. A bootloader sits in the boot block (16K) of the flash which allows programming and loading of the main block (480K). The Flash is mapped to address 0x SRAM The SRAM uses a standard bus interface. No special code is required to interface with it. The SRAM is mapped to address 0x

14 CompactFlash Used in Memory Mapped I/O Mode. Mapped to 0x address range AT91RM9200 provides special glue logic for CompactFlash interfaces.

15 Software MIDI Designed for communication between instruments and other musical devices. Serial protocol at bits/sec. Instead of sound data, MIDI uses note on/off messages and the receiving device can react to them accordingly. Example message: Note ON 144 Note # 60 Key Pressure 96

16 Software User Interface Model: Hyundai HG25604 (Monochrome) Size: 256x128 Controller: Epson/Seiko SED1330 Addressed through the External Bus Interface and memory mapped to 0x and 0x V-Tolerant Buffer between LCD and Bus

17 Software User Interface

18 Software Sound Synthesis FM Synthesis Oscillators control the frequency of other oscillators. Varying amplitudes and frequencies in the controlling oscillators create different levels of harmonics in the output, allowing a wide variety of sounds to be synthesized.

19 Software File System FAT16 Stores MIDI files and instrument definitions. Widely supported, allowing easy transfer of data between the Encore and a computer.

20 The End

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