1 Hardware Overview 1.2 System Unit Components
14 TOSHIBA NB100 Maintenance Manual
y 2 stereo ADCs support 16/20-bit PCM format for two stereo independent sound inputs.
y 16/20/24-bit S/PDIF-OUT supports 44.1K/48K/88.2K/96K/192KHz sample rate.
y All ADCs support 44.1K/48K/96KHZ sample rate.
y 4 GPIOs (GPIO0/GPIO3 are digital GPIO shared with digital MIC interface,
GPIO1/GPIO2 are analog) for customized applications.
y High quality analog differential CD input.
y 2 jack detection pins each designed to detect up to 4 jacks.
y Supports hardware digital volume control for digital microphone input.
y Supports external PCBEEP input and built-in digital BEEP generator.
−
KBC/EC (Keyboard Controller/Embedded Controller)
A single ITE8521E-L chip is used to serve as KBC/ EC and Super IO.
y KBC
− Scan controller function
− Interface controller function
y EC
− Power supply sequence control
− Overheat shutdown support
− LED control
− Beep control
− Device ON/OFF
− Cooling fan speed control
− Universal I/O port
− Battery capacity check
− Flash memory reprogramming function
− EC access interface
− I2C communication control
Battery EEPROM
y 24C02 equivalent (128 words x 16 bits, I2C interface) integrated in battery pack.
− Storing records of battery use
Clock Generator
y ICS9LPRS501
− Generating the clock signal required for the system.