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IBM Power 595 Technical Overview and Introduction
Figure 2-9 SPCN control network
2.1.6 System VPD cards
Two types of Vital Product Data (VPD) cards are available: VPD and smartchip VPD (SVPD).
VPD for all field replaceable unit (FRUs) are stored in Serial EPROM (SEEPROM). VPD
SEEPROM modules are provided on daughter cards on the midplane (see Figure 2-6 on
page 43) and on a VPD daughter card part of processor book assembly, Both are redundant.
Both SEEPROMs on the midplane daughter card will be accessible from both SC cards. Both
SEEPROMs on the processor book card will be accessible from both Node Controller cards.
VPD daughter cards on midplane and processor book planar are not FRUs and are not
replaced if one SEEPROM module fails.
SVPD functions are provided on daughter cards on the midplane (see Figure 2-6 on page 43)
and on a VPD card part of the processor book assembly; both are redundant. These SVPD
cards are available for Capacity Upgrade on Demand (CUoD) functions. The midplane SVPD
daughter card also serves as the anchor point for system VPD collection. SVPD function on
both the midplane board and the processor book board will be redundant. Both SVPD
functions on the midplane board must be accessible from both SC cards. Both SVPD
functions on the processor book planar board must be accessible from both NC cards. Note
that individual SVPD cards are not implemented for each processor module but just at
processor book level. MCM level SVPD is not necessary for the following reasons:
All four processors in a book are always populated (CoD).
All processors within a system must run at the same speed (dictated by the slowest
module) and that speed can be securely stored in the anchor card or book SVPD
modules.
The MCM serial number is stored in the SEEPROMs on the MCM.
Figure 2-6 on page 43 shows the VPD cards location in midplane.
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