1 Hardware Overview
1.2 System Unit Components
16
Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual
Audio Controller
The AD1981B integrated audio controller supports multimedia. The sound system
feature contains the following:
y
Variable Sample Rate Audio
y
External Audio Power –Down Control
y
Integrated Stereo Headphone Amplifier
y
Stereo Full-Duplex Codec
y
20-Bit PCM DAC
y
Dual MIC Input with Built-In Programmable Preamp
y
High Quality CD Input with Ground Sense.
KBC/EC (Keyboard Controller/Embedded Controller)
A single LPC 47N249 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 EE PROM
y
24C02 equivalent (128 words x 16 bits, I2C interface) integrated in the battery pack
−
Storing records of battery use
Содержание Dynabook Vx/4
Страница 11: ...Chapter 1 Hardware Overview ...
Страница 12: ...1 Hardware Overview ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
Страница 71: ...Chapter 3 Diagnostic Programs ...
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Страница 142: ...Chapter 4 Replacement Procedures 4 1 ...
Страница 143: ...4 Replacement Procedures 4 ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
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Страница 213: ...6000 1 次 Appendices ...
Страница 214: ...Appendices App ii Satellite M40 M45 TECRA A4 dynabook VX 4 Maintenance Manual ...
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