3-16 Software Functional Overview
System Power Plane
The following table describes the system power plane divisions.
System Power Plane Divisions
Power Group
Power Control Pin
Controlled Devices
B+
NIL
IMM, (9V-20V)
5V always
NIL
PIC 16C62A
3V always
NIL
RTC I/F, Internal modem ring
RTCVCC
NIL
RTC
+12V
PWRON
PCMCIA Card
+5V
PWRON
BIOS ROM, M38867, MAX32443,
PCMCIA Slot (5V VCC)
+3V
PWRON
VGA, Video RAM, PCMCIA chip, PCMCIA
Slot (3V), DRAM, 440BX (DRAM I/F)
+3VS
SUSB#
Audio, PIIX4E(ISA I/F Power), Clock
Generator, FIR (IM1651 SCLK), TAG
RAM, PCI Interface, Super I/O
+5VS
SUSB#
HDD, CD-ROM, USB, Internal K/B, Glide
Pad, External PS/2 Mouse, FDD, Audio
AMP