Intel 815 - Manual (Page 142)

Power Delivery
R
142 Intel
®
815 Chipset Platform Design Guide
supplied by the power supply. Due to the requirements of main memory and the PCI 3.3 Vaux
(and possibly other devices in the system), it is necessary to create a dual power rail.
The solutions in this Design Guide are only examples. Many power distribution methods achieve
the similar results. When deviating from these examples, it is critical to consider the effect of a
change.
Figure 71. Power Delivery Map
Core: VCC_VID: 2.0V
15.6A S0, S1
Intel ® 815 Chipset
Platform Power Map
VTT: 1.5 V ± 0.135 V
2.7 A S0, S1
VCC3_3: 3.3 V ± 0.165 V
15 mA S0, S1
VRM 8.5
Processor
Fan
-12 V Serial xceivers-5: 5 V ± 0.25 V
30 mA S0, S1
Serial xceivers-12: 12 V ± 1.2 V
22 mA S0, S1
Serial xceivers-N12: -12 V ± 1.2 V
28 mA S0, S1
Serial ports
VTT regulator
USB cable power: 5 V ± 0.25 V
1 A S0, S1; 1 mA S3, S5
CK815-3.3: 3.3 V ± 0.165 V
280 mA S0, S1
CK815-2.5: 2.5 V ± 0.125 V
100 mA S0, S1
CLK
2.5 V regulator
1.8 V regulator
AC'97
3.3 VSB regulator
ATX P/S
with 720 mA
5 VSB
± 5%
12 V
± 5% 3.3 V
± 5%
5 V
± 5%
-12 V
± 10%
LPC super I/O: 3.3V ±0.3V
50 mA S0, S1
PS/2 keyboard/mouse 5 V ± 0.5 V
1 A S0, S1
Super I/O
2 DIMM slots: 3.3 VSB ± 0.3 V
4.8 A S0, S1; 64 mA S3
(3) PCI 3.3 Vaux: 3.3 VSB ± 0.3 V
1.125 A S0, S1; 60 mA S3, S5
82559 LAN down 3.3 VSB ± 0.3 V
195 mA S0,S1; 120 mA S3, S5
PCI
5 V dual
switch
5V_DUA
L
GMCH: 3.3 VSB ± 0.165 V
110 mA S3, S5
GMCH core: 1.8 V ± 3%
1.40 A S0, S1
GMCH: 3.3 V ± 0.165 V
1.40 A S0, S1
FWH core: 3.3 V ± 0.3 V
67 mA S0, S1
ICH resume: 3.3 VSB ± 0.3 V
1.5 mA S0, S1; 300 µA S3, S5
ICH RTC: 3.3 VSB ± 0.3 V
5 µA S0, S1, S3, S5
ICH core: 3.3 V ± 0.3 V
300 mA S0, S1
ICH hub I/O: 1.8 V ± 0.09 V
55 mA S0, S1
pwr_del_map
AC'97 3.3 VSB: 3.3 VSB ± 0.165 V
150 mA S3, S5
AC'97 12V: 12 V ± 0.6 V
500 mA S0, S1
AC'97 -12 V: -12 V ± 1.2 V
100 mA S0, S1
AC'97 5 V: 5 V ± 0.25 V
1.00 A S0,S1
AC'97 5 VSB: 5 VSB ± 0.25 V
500 mA S0, S1
AC'97 3.3 V: 3.3 V ± 0.165 V
1.00 A S0,S1
Core: VCC_VID: 1.5 V
28.5 A S0, S1
Core: VCC_VID: 1.75 V
22.6 A S0, S1
Notes:
Shaded regulators / components are ON in S3 and S5.
KB / mouse will not support STR.
Total max. power dissipation for GMCH = 4 W.
Total max. power dissipation for AC'97 = 15 W.
VDDQ regulator
GMCH VDDQ
2.0 A S0, S1 Intel ® 815 chipset
VTT: 1.25 V
2.7 A S0, S1
In addition to the power planes provided by the ATX power supply, an instantly available Intel
815 chipset platform (using Suspend-to-RAM) requires six power planes to be generated on the
board. The requirements for each power plane are documented in this section. In addition to on-
board voltage regulators, the CRB will have a 5V Dual Switch.