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1.2 System Unit Components
1 Hardware Overview
Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual
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The AD1981B integrated audio controller supports multimedia. The sound system feature
contains the following:
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Variable Sample Rate Audio
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External Audio Power –Down Control
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Integrated Stereo Headphone Amplifier
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Stereo Full-Duplex Codec
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20-Bit PCM DAC
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Dual MIC Input with Built-In Programmable Preamp
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High Quality CD Input with Ground Sense.
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KBC/EC (Keyboard Controller/Embedded Controller)
A single LPC 47N249 chip is used to serve as KBC/ EC and Super IO.
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KBC
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Scan controller function
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Interface controller function
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EC
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Power supply sequence control
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Overheat shutdown support
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LED control
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Beep control
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Device ON/OFF
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Cooling fan speed control
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Universal I/O port
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Battery capacity check
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Flash memory reprogramming function
?
EC access interface
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I2C communication control
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Battery EE PROM
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24C02 equivalent (128 words x 16 bits, I2C interface) integrated in the battery pack
?
Storing records of battery use
?
Clock Generator
?
ICS954206B
Summary of Contents for SATELLITE M40 Series
Page 2: ...ii S No ...
Page 12: ...Chapter 1 Hardware Overview ...
Page 13: ...1 Hardware Overview ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
Page 71: ...Chapter 3 Diagnostic Programs ...
Page 74: ......
Page 142: ...Chapter 4 Replacement Procedures 4 1 ...
Page 143: ...4 Replacement Procedures 4 ii Satellite M40 M45 TECRA A4 dynabook Vx 4 Maintenance Manual ...
Page 213: ...6000 1 Appendices ...
Page 214: ...Appendices App ii Satellite M40 M45 TECRA A4 dynabook VX 4 Maintenance Manual ...
Page 217: ...Appendices Satellite M40 M45 TECRA A4 dynabooK VX 4 Maintenance Manual App v ...