VS1000 Datasheet - VLSI Solution

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VS10007 FIRMWARE OPERATION7.3 UART Boot/MonitorWhen byte 0xef is sent to RX at 115200 bps, the firmware enters monitor mode and communicateswith vs3emu. Memory contents can be displayed, executables can be loaded and run,or the firmware code can be restarted or continued.The UART is also a convenient way to program the NAND FLASH boot sector(s) or the SPIEEPROM.Version: 1.43, 2013-05-28 20
VS10007 FIRMWARE OPERATION7.4 Default Firmware Features7.4.1 USB Mass Storage and Audio DeviceWhen USB cable insertion is detected by the firmware, playing of the current file is stoppedand USB handling code is started. The internal clock is configured to 4.0× 12 MHz = 48 MHz,the analog power is configured to 3.6 V, the USB peripheral is initialized, and the USB pull-upresistor is enabled.If GPIO0_6 has a pull-up resistor, VS1000 appears as an USB Audio Device. If GPIO0_6 hasa pull-down resistor, VS1000 appears as an USB Mass Storage Device.If during power-on the NAND FLASH contained a valid boot sector, the NAND FLASH diskwill be used with the mass storage device. The NAND FLASH disk requires a filesystem-levelformatting before it can be used. If NFCE had a pull-down instead of pull-up, or if a valid bootsector was not found, a RAM disk is used instead.The RAM disk is preformatted and can be used immediately, but it does not retain its contentsbetween USB detachment and insertion. The RAM disk is only intended for loading softwarethrough USB. You can copy a file VS1000_B.RUN to RAM disk and it will be automaticallyrun when you disconnect the USB cable. This mechanism can be used to program the NANDFLASH boot sector (perhaps containing custom boot code), and also for programming a SPIEEPROM in case NAND FLASH is not used in the application.7.4.2 Default Player ApplicationWhen the USB cable is detached, the contents of the disk is checked. If the disk seems tocontain a FAT16 or FAT32 filesystem, a cleanup of unused sectors is performed. The cleanupmakes the disk perform faster the next time something is written on it. If a full disk has beenformatted or emptied, this cleanup can take considerable time, even 30 seconds or more. Afterthe cleanup is finished the player starts to play files.Note: normally Windows formats smaller than about 16 MB disks as FAT12. The player has onlypartial support for FAT12 disks: no cleanup is performed, subdirectories are not allowed, andfiles are assumed not to be fragmented. If disks as small as or smaller than this are required, itis possible to format them as FAT16 with the following command. format e: /A:512 /FS:FATThe default player application only decodes Ogg Vorbis files, but it can be extended to allowsome simple codecs, like a WAV decoder.In addition to the power button, 5 keys are connected to GPIO0_[4:0] so that they connecta 10 kΩ pull-up to the I/O when the button is pressed, and 100 kΩ pull-downs keep the lineslow otherwise. The resistors are needed because these lines are also used for NAND FLASHcommunication. The keys are read approximately 16 times per second.The key control can be changed by replacing the default key mapping table. The default userinterface uses six buttons.Version: 1.43, 2013-05-28 21
Page 1 and 2: VS1000VS1000 - Ogg Vorbis Player IC
Page 3 and 4: VS1000LIST OF FIGURESList of Figure
Page 5 and 6: 3 Characteristics & SpecificationsV
Page 7 and 8: VS10003 CHARACTERISTICS & SPECIFICA
Page 9 and 10: VS10003 CHARACTERISTICS & SPECIFICA
Page 11 and 12: VS10004 PACKAGES AND PIN DESCRIPTIO
Page 13 and 14: VS10005 EXAMPLE SCHEMATIC5 Example
Page 15 and 16: VS10006 VS1000 FUNCTIONAL BLOCKSRet
Page 17 and 18: VS10006 VS1000 FUNCTIONAL BLOCKS6.3
Page 19: VS10007 FIRMWARE OPERATION7.2 NAND
Page 23 and 24: VS10007 FIRMWARE OPERATION7.5 Suppo
Page 25 and 26: VS10008 VS1000 ERRATA8 VS1000 Errat
Page 27: VS100010 CONTACT INFORMATION10 Cont

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