Table of Contents
Advertisement
®
Intel
855GME Chipset and Intel
Layout Checklist
®
Table 149. Intel
855GME Chipset GMCH Layout Checklist (Sheet 6 of 6)
Checklist Items
HXSWING
HYSWING
Analog Power
Filtering
NOTES:
1. The BREQ0# pin on the GMCH corresponds to the BR0# pin on the processor.
2. The CPURST# pin on the GMCH corresponds to the RESET# pin on the processor.
3. HA[35:3]# pins on the GMCH correspond to A[31:3]# pins on the processor.
4. HD[63:0]# pins on the GMCH correspond to D[63:0]# pins on the processor.
5. HADSTB[1:0]# pins on the GMCH correspond to ADSTB[1:0]# pins on the processor.
6. HADSTBN[3:0]# pins on the GMCH correspond to DSTBN[3:0]# pins on the processor.
7. HADSTBP[3:0]# pins on the GMCH correspond to DSTBP[3:0]# pins on the processor.
8. HREQ[4:0]# pins on the GMCH correspond to REQ[4:0]# pins on the processor.
9. The HTRDY# pin on the GMCH corresponds to the TRDY# pin on the processor.
10.The HLOCK# pin on the GMCH correspond to LOCK# pin on the processor.
®
13.3
Intel
13.3.1
8-Bit Hub Interface Layout Checklist
Table 150.
8-Bit Hub Interface Layout Checklist
#
1
Data traces need to be routed 5 mils wide with 15 mils spacing.
Strobe traces need to be routed 5 mils wide with 20 mils spacing
2
from other signals, 15 mils spacing intra-pair.
In order to breakout of the MCH and 6300ESB package the Hub
3
Interface signals may be routed 5 on 5. Signals need to be
separated within 300 mils of the package.
4
Maximum trace length is eight inches.
Data signals must be matched within ±0.25 inches of the HI_STB
5
differential pair.
HI_STB/HI_STBS and HI_STB#/HI_STBF lengths need to be
6
matched.
(Single Reference Driver Circuit only) HIREF divider should be
7a
placed no more than four inches of away from MCH or 6300ESB.
(Local Reference Divider Circuit only) HIREF dividers should be
7b
placed no more than four inches of away from MCH or 6300ESB.
8
HI signals need to be referenced to ground.
312
®
6300ESB ICH Embedded Platform Design Guide
Recommendations
• Voltage divider components for each input
should be placed within 0.5 inches of their
respective pins.
• Use a 15 mil wide trace maintaining a
minimum of 25 mils separation to other
signals.
• There are 8 analog circuits that require
filtered supplies on the Intel 855GME
chipset.
6300ESB Layout Checklist
Layout Recommendations
Comments
• The HXSWING and HYSWING
inputs of GMCH are used to provide
reference voltage for the
compensation logic.
• Refer to
Section 4.8.3.3
for more
information.
• Refer to
Section 4.8.3.4
for detailed
filter requirements.
Comments
Advertisement
Table of Contents
