M54455EVB Freescale, M54455EVB Datasheet - Page 35

• Manufacturer Part Number: M54455EVB
• Manufacturer: Freescale

Specifications of M54455EVB

• Architecture: 32-bit (not ARM)
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Reference Designator
4.18
The M54455EVB provides 12 Tektronix P6860 compression connections for use with TLA7Axx logic
analyzer modules. These probes allow you to probe Flexbus, PCI and DDR2 signals. See the M54455EVB
schematics for more details.
4.19
The M54455EVB provides two Freescale QuiccSupply MC34702 power regulators. These power
regulators provide 3.3 V, 1.8 V, 1.5 V, and 1.2 V to devices on the board, with the exception of the PCI
slots. The regulators generate these voltages from a 5-V external supply. The 5-V supply can be provided
through one of the following: the ATX power connector, a barrel jack connector, or a 6-pin molex power
connector to a lab-grade regulated supply.
Jumpers are provided that allow for the 3.3- and 1.5-V supplies to be separated from the MCF5445x. The
intention of these jumpers is to connect a current meter to measure the power consumed by the MCF5445x
processor or to allow for the injection of a variable voltage power supply for test purposes.
The PCI sockets are powered directly from the ATX supply, which allows for much higher PCI card power
consumption. PCI is only available if an ATX supply powers the board. The ATX 5-V line is connected to
the Freescale QuiccSupply MC34702 regulators. This isolates the power consumption of the PCI bus from
the board ASICs.
4.20
There are several jumpers on the M54455EVB that allow you to control the hardware configuration. The
following table provides descriptions for all the jumper settings.
Freescale Semiconductor
H4[1:2]
H4[3:4]
Logic Analyzer Connections
Power Regulation
Jumpers, Headers, and Switches
The virtual COMM port driver loses communication with the M54455EVB
when the board is powered off and back on. You must force a reconnect in
the serial terminal program following a power-on reset of the EVB. For this
reason, it can be difficult to see power-on boot messages from the EVB
when using the power button on the front of the M54455EVB’s case.
However, the EVB provides a reset button (SW2) which does not force the
CP2102 to re-enumerate, and thus, does not require a reconnect in the serial
terminal. This allows you to witness any reset messages, but requires that
the case be opened so that SW2 can be accessed.
Setting
OFF
OFF
ON
ON
2
2
1
Clock Generator Disable
33MHz PCICLK/CLKIN Frequency
66MHz PCICLK/CLKIN Frequency
M54455EVB User’s Manual, Rev. 4
Table 35. Jumper Settings
NOTE
Function
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