Intel Atom E660, User Manual, Page: 44 / 67

Reference Board Summary
Intel
®
Atom™ Processor E660 with Intel
®
Platform Controller Hub EG20T Development Kit
User Manual January 2012
44 Document Number: 324213-002
4.3.3 Manual VID Support for CPU
The COM Express* module supports manual VID operation for the processor and
graphics core VRs. Headers J5C2 (VCC_VID override) and J5D1 (OVR_ALL_VID_N) are
provided to incorporate “VCC VID override”, and J5D2 (VNN_VID override) and J5D1
(OVR_ALL_VID_N) are provided to incorporate “VNN VID override”. See Figure 13 . VID
override allows for overriding the VID outputs to the VCC_S and VNN_S VR. The intent
of the “VID override” circuit is to enable debugging and testing. See Table 16 for the
VID code table.
Table 15. BSEL Jumper Settings
Processor Override
Processor External
Reference Clock
Frequency (MHz)
Processor driven (default)
J4D1: 2-3
J4D2: 2-3
J4D3: 2-3
No Override
0.6 GHz (Ultra Low Power) or
1.0 GHz (Entry SKU) or
1.3 GHz (Mainstream SKU) or
1.6 GHz (Premium SKU)
BCLK = 100 MHz
J4D1: Open
J4D2: Open
J4D3: Open CPU BSEL 0=0
CPU BSEL 1=0
CPU BSEL 2=0