MiTAC 7521 PLUS/N SMM and System BIOS, 7521Plus / N N/B MAINTENANCE, COM port assignment

7521Plus / N N/B MAINTENANCE

1.3.5 COM port assignment

‰COM1 : MODEM / RS-232 / Disable

‰COM2 : IR / RS-232 / Disable

1.4 SMM and System BIOS

System Management Mode

7521 plus system has built in several power saving modes to prolong the battery usage for mobile purpose. User can enable and configure different degrees of power management modes via ROM CMOS setup (booting by pressing F2 key). Following are the descriptions of the SMM and power management modes supported.

Full On Mode

In this mode, each device is running with the maximal speed. CPU clock is up to its maximum.

Doze Mode

In this mode, CPU will be toggling between on & stop grant mode either. The technology is clock throttling. This can save battery power without loosing much computing capability. The CPU power consumption and temperature is lowered in this mode.

Standby

For more power saving, it turns off the peripheral component. In this mode, the following is the status of each device.

•CPU: Stop grant

•LCD: backlight off

•HDD: spin down

•FDD: standby

Suspend Mode

The most chipset of the system is entering power down mode for more power saving. In this mode, the following is the status
of each device.	39