1 Hardware Overview

1.5 Power Supply

?Battery charging control

?The EC controls the following.

The quick charging ON/OFF

The detection of full charge

?Detection of the low battery

?The EC detects the low battery point by the gas gauge.

LB10M = The system will be driven by the battery for 12 more minutes.

LB0 = The battery won't be able to drive the system after 3 minutes.

LB1 = The battery can drive the system only during the suspend process.

LB2 = The battery cannot drive the system.

?New battery installation

?When a new battery is installed, the EC communicates with the E2PROM in the battery to read information of the newly installed battery.

?Battery capacity calculation

?The EC reads battery remaining and percentage capacity from the battery through SMBus.

1-16

[CONFIDENTIAL]

Satellite M40X Maintenance Manual

Page 26
Image 26
Toshiba Satellite M40X manual Hardware Overview Power Supply