VS2000 Datasheet, PDF (13/21 Pages) List of Unclassifed Manufacturers – Headtracking Multichannel USB Audio Headphone IC / USB DAC

VLSI
Solution ^y
VS2000 PRELIMINARY
VS2000
6. FIRMWARE OPERATION
6 Firmware Operation
The firmware uses the following pins (see the example schematics in Section 7):
Pin
VHIGH
PWRBTN
USBN
USBP
GPIO0 0
GPIO0 1
GPIO0 2
GPIO0 3
GPIO0 4
GPIO0 5
GPIO0 6
GPIO0 7
GPIO0 8
GPIO0 9
GPIO0 10
GPIO0 11
GPIO0 12
GPIO0 13
GPIO0 14
GPIO1 0 / XCS
GPIO1 1 / SCLK
GPIO1 2 / SI
GPIO1 3 / SO
GPIO1 4 / TX
GPIO1 5 / RX
Description
VBUS with diode to VHIGH
Power button starts regulator + VBUS-triggered (Mode Select)
external 1 MΩ pull-up
external 1 MΩ pull-up
external 1 MΩ pull-down resistor, Key 1 connects a 100 kΩ pull-up resistor (Vol-)
external 1 MΩ pull-down resistor, Key 2 connects a 100 kΩ pull-up resistor (Vol+)
external 1 MΩ pull-down resistor, Key 3 connects a 100 kΩ pull-up resistor (Pause)
external 1 MΩ pull-down resistor, Key 4 connects a 100 kΩ pull-up resistor (Play)
external 1 MΩ pull-down resistor, Key 5 connects a 100 kΩ pull-up resistor (Rewind)
external 1 MΩ pull-down resistor, Key 6 connects a 100 kΩ pull-up resistor (Fast Forward)
external 1 MΩ pull-down resistor, Key 7 connects a 100 kΩ pull-up resistor (Effect Level Select)
external 100 kΩ pull-up resistor
USB LED - Red
Effect Level LED - Green (PWM-controlled)
Tracking LED - Red
Tracking LED - Green
Headtracker input right
Headtracker input left
Audio LED, External power control, with 1 MΩ pull-down resistor
external pull-up to enable SPI EEPROM boot
820 Hz headtracker transmit / SPI EEPROM SCLK
SPI EEPROM MISO
40 kHz headtracker transmit / SPI EEPROM MOSI
UART transmit
UART receive
Tracking LEDs indicate the operation mode:
Green On
Tracking On, RED On if tracking error is detected
Green Off, Red Off Tracking Off, spatial processing active
Green Off, Red On Bypass mode, no spatial processing, down-mixing only
USB LED is lit when setup packets are received, i.e. during device configuration, and when audio controls are
changed.
Audio LED is lit when audio data is transferred and is turned off after a short timeout when audio transmission
stops.
Version 0.3, 2007-09-05
13