Product specifications

Design Guide - VT82C694X Apollo Pro133 with VT82C686A
Preliminary Revision 0.5, November 19, 1999 35 Motherboard Design Guidelines
Technologies, Inc.
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System
Clock
Synthesizer
Socket-370
CPU
CPUCLK
SDCLK_F
HCLK
SDCLKIN
DIMM1
VT82C694X
DIMM3
DIMM2
SDCLK0
SDCLK9
SDCLK10
SDCLK11
SDCLK8
SDCLK7
SDCLK6
SDCLK5
SDCLK4
SDCLK3
SDCLK2
SDCLK1
0 ~ 33
ohm
10 ~ 33 pF
L
NB
L
NB
L
SD
+ 4.5"
L
SD
L
DOUT
(as short as possible)
0 ~ 33
ohm
10 ~ 33 pF
DCLKWR
DCLKO
10 ~ 33 pF
DIMM4
SDCLK13
SDCLK14
SDCLK15
SDCLK12
CK0
CK3
CK2
CK1
CK0
CK3
CK2
CK1
CK0
CK3
CK2
CK1
CK0
CK3
CK2
CK1
HCLK
(near the chip)
L
SD
L
SD
L
SD
(near the chip)
Figure 2-27. Host Clock and SDRAM Clock Layout Recommendations for Socket-370 Systems