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Stylistic 1200 Tech Reference Manual (PDF) - The Labs

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Battery Charge Level and Power Management 7<br />

<strong>The</strong> <strong>Stylistic</strong> <strong>1200</strong> pen tablet monitors the status of the battery pack. When the battery charge or voltage<br />

level drops to low levels, the system is forced into Idle or suspend mode to increase battery life and<br />

prevent data loss. Table 7-7 describes system operation for the different battery levels.<br />

Table 7-7 Low Battery Modes<br />

Mode<br />

Normal mode:<br />

Battery charge 12 to 100% or system<br />

connected to external power.<br />

Low battery mode:<br />

Battery charge below 12% (one “cell”<br />

icon in Battery Gauge blinking).<br />

Critically low battery mode:<br />

Battery charge at critically low level.<br />

Note that the percent of full battery<br />

charge cannot be determined for the<br />

critically low battery level. <strong>The</strong> circuit<br />

that detects the critically low voltage<br />

level monitors the battery voltage<br />

independent from the Power MCU.<br />

(<strong>The</strong> Power MCU calculates the<br />

percent of battery charge while the<br />

system operates above the critically<br />

low battery level.)<br />

Description<br />

Power management features operate normally.<br />

System is forced into low battery mode (CPU<br />

speed reduced to speed selected for Low<br />

Battery CPU Speed BIOS option). <strong>The</strong> low<br />

battery alarm (audible “beep”) is sounded if the<br />

Audio BIOS option is enabled.<br />

System is forced to suspend (suspend-to-RAM<br />

mode). System will not resume until a<br />

sufficiently charged battery back is installed or<br />

external power is connected.<br />

Note that in the event of a critically low battery,<br />

the system is forced into suspend-to-RAM mode<br />

regardless of the suspend mode setting in the<br />

BIOS.<br />

7-10 System Power

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