XPC564A Datasheet, PDF (57/67 Pages) Freescale Semiconductor, Inc – Evaluation system supporting Freescale MPC564xA microprocessors

powered by external 3.3V or by the 3.3V VRC33 voltage regulator output from
the MPC564xA processor.
When the Mini-Module is attached to the xPC56XXMB motherboard, the 3.3V
external power is directly derived from the motherboard itself. When the Mini-
Module is operated as a stand-alone unit, the 3.3V power is derived from the
voltage supply that is powering the Mini-Module. Note that if the Mini-Module
is powered by 5V instead of 3.3V, the 3.3V will be unavailable to power
VDDE7. Jumper J18 should be set correctly to prevent damage.
Jumper Setting
Connected
(default)
Disconnected
Effect
VDDE7 is powered by external 3.3V
VDDE7 is not powered by external 3.3V
CT4 – VDDREG 5V Configuration (xPC564AADPT176S only)
This cut trace determines whether the VDDREG pin is powered by 5V from
the xPC56XXMB motherboard, or dictated by jumpers J18 and J19
Jumper Setting
Connected
(default)
Disconnected
Effect
VDDREG is powered by 5V from the xPC56XXMB
motherboard
VDDREG is not powered by 5V from the xPC56XXMB
motherboard and its power is instead dictated by J18 and
J19
CT5 – VDDE7 5V Configuration (xPC564AADPT208S only)
This cut trace, along with CT3, determine whether the VDDE7 pins are
powered by external 3.3V or by the 3.3V VRC33 voltage regulator output from
xPC564A EVB User Manual
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