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1.2 System Unit Components 1 Hardware Overview
Satellite/Satellite Pro/C650/C655 Maintenance Manual 13
CONEX CX20671 integrated audio controller supports multimedia. The sound system
features contain the following:
y 24-bit, two pairs of independent DACs and three pairs of independent ADCs
y Integrated 2 WRMS (per channel) class-D stereo speaker amplifier with Spread
Spectrum and 10-kV ESD withstand capability
y Digital Microphone interface with internal MIC boost supporting up to two multiplexed
digital element array microphones
y Internal microphone boost
− Digital: 0, 12, 24, 36, 48 dB
− Analog: 0, 10, 20, 30, 40 dB
y Independent sampling rate for DAC and ADC; supports audio formats ranging from 16-
bit, 44.1 kHz to 24-bit, 192 kHz
y Pop Shield: pops and clicks reduction circuitry, including class-D speaker outputs
y Jack sense detects up to four jacks using only one sense pin
y Digital Mixer
y Supports 32-bit/64-bit Windows OS and Linux
KBC/EC (Keyboard Controller/Embedded Controller)
A KBC Winbond NPCE781LA0DX 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