Toshiba Satellite A110 Maintenance Manual - Page 25

Power Supply, Hardware Overview - ac adapter

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1.5 Power Supply 1 Hardware Overview 1.5 Power Supply This specification defines the performance and characteristic of 65W AC adapter power supply. It supplies a constant voltage 19V output source for Detroit 20 series notebook computer. ‰ A/D conversion • The EC uses 10-bit sampling for A/D conversion to determine the following values: - Battery and temperature ‰ AC adaptor and battery check • The EC checks the following by A/D converted values: - Battery installed • The EC checks the following by GPIO values: - AC adaptor connected ‰ Abnormal check • The EC determines whether the condition is abnormal, and if so, stores an error code into the error register. ‰ Input port management • The EC monitors the following input signal status: - System power ON/OFF status - Direct CD power ON/OFF status ‰ Beep and LED control • Beep is caused by the low battery status. • The EC controls the following two kinds of LED - DC IN LED (one color: green) • Green = indicates AC adaptor is connected - Battery LED (two colors: orange and green) • Green solid = The battery is fully charged. • Orange = The computer is quick-charging the battery / The battery is low. ‰ Power ON/OFF sequence • When power is turned on or off, the EC starts the power on or off sequence. - SQ0-4 = power ON sequence - SQ5-B = power OFF sequence Detroit 20 /Detroit 20E Series Maintenance Manual [CONFIDENTIAL] 1-11

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1.5
Power Supply
1
Hardware Overview
Detroit 20 /Detroit 20E Series Maintenance Manual
[CONFIDENTIAL]
1-11
1.5
Power Supply
This specification defines the performance and characteristic of 65W AC adapter power supply.
It supplies a constant voltage 19V output source for Detroit 20 series notebook computer.
A/D conversion
•
The EC uses 10-bit sampling for A/D conversion to determine the following values:
–
Battery and temperature
AC adaptor and battery check
•
The EC checks the following by A/D converted values:
–
Battery installed
•
The EC checks the following by GPIO values:
–
AC adaptor connected
Abnormal check
•
The EC determines whether the condition is abnormal, and if so, stores an error
code into the error register.
Input port management
•
The EC monitors the following input signal status:
–
System power ON/OFF status
–
Direct CD power ON/OFF status
Beep and LED control
•
Beep is caused by the low battery status.
•
The EC controls the following two kinds of LED
–
DC IN LED (one color: green)
•
Green = indicates AC adaptor is connected
–
Battery LED (two colors: orange and green)
•
Green solid = The battery is fully charged.
•
Orange = The computer is quick-charging the battery / The battery is low.
Power ON/OFF sequence
•
When power is turned on or off, the EC starts the power on or off sequence.
–
SQ0-4 = power ON sequence
–
SQ5-B = power OFF sequence