Toshiba Satellite A500 - Page 29

1 Hardware Overview 1B1.2 System Unit Components
16 Satellite/Satellite Pro/A500/A505/A507/dynabook Maintenance Manual
 Card Bus Controller
y RICOH R5U230
− Memory Card Reader Controller
 Audio Controller
Realtek ALC272 integrated audio controller supports multimedia. The sound system
features contain the following:
y 2 Stereo DACs support 16/20/24-bit PCM format for stereo audio playback
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 KBC WINBOND WPCE781L 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