Software Functional Overview 3-21
Device Power Management
This section illustrates the power control status of each key device/component
of the system under each power management mode.
Power states of local devices
Power State
Component
Doze
Stand By
STR
STD/SOFF
CPU
Stop Grant
Stop Clock
Power Off
Power Off
MTXC/440BX
ON
Stop Clock
Power Off
(except Vcc)
Power Off
PIIX4
ON
ON
Power Off
(except SUSVcc,
RTCVcc)
Power Off
(except SUSVcc,
RTCVcc)
DRAM
ON
Self Refresh
Self Refresh
Power Off
L2 CACHE
ON
Power down
Power Off
Power Off
CD-ROM
ON
Power down
Power Off
Power Off
HDD
ON
Power down
Power Off
Power Off
FDD
ON
Power down
Power Off
Power Off
KBC
ON
ON
Power down
Power Off
PIC 16C62
ON
ON
Power down
Power down
VGA/VRAM
ON
Power down
Power down
Power Off
TI1221 (PCMCIA)
ON
Power down
Power down
Power Off
Sound
ON
Power down
Power Off
Power Off
LCD Backlight
ON
Power down
Power Off
Power Off
Serial (UART1)
ON
Power down
Power down
Power Off
IR Port (UART2)
ON
Power down
Power Off
Power Off
Modem
ON
Power down
Power down
Power down
Parallel
ON
Power down
Power Off
Power Off
Device PM Control/Stand By Mode
Device
Power Down
Controlled By
Description
CPU
Hardware
Controlled by SUS_STAT#1 pin
MTXC/440BX
Hardware
Controlled by SUS_STAT#1 pin
VGA Chip
Software
Controlled by GPO[8] pin
PCMCIA Controller
Software
Controlled by GPO[30] pin
Super I/O Chip
Software
SMC769 support power down command
KBC
Working
FDD
Software
FDD support power down command