M5211DEMO Freescale Semiconductor, M5211DEMO Datasheet - Page 10

• Manufacturer Part Number: M5211DEMO
• Description: KIT DEMO FOR MCF5211
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: MPUr

Specifications of M5211DEMO

• Contents: SBC, Cables and Software
• Processor To Be Evaluated: MCF521x
• Data Bus Width: 12 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 9 V
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire
• Core Sub-architecture: Coldfire V2
• Silicon Core Number: MCF52
• Silicon Family Name: MCF521x
• Rohs Compliant: Yes
• For Use With/related Products: MCF5211, MCF5212, MCF5213
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power
7.3
The OFF/ON switch, shown in
In the OFF position, the board is unpowered and no voltage is present on the upper voltage rail. In the ON
position, the input voltage source is connected to the upper voltage rail.
7.4
Configuration of applied input power is controlled using two option headers. The PWR_SEL header
selects between the on-board voltage regulator and the USB voltage input. The VX_EN header connects
J1-1 directly to the upper voltage rail. The illustrations below show the different configuration for each
option header.
7.4.1
Figure 6
Power from the integrated BDM is drawn from the USB bus and is limited to 500 mA. Excessive current
drain will violate the USB specification causing the USB bus to disconnect.
The on-board voltage regulator (VR1) accepts power input through a 2.1 mm barrel connector (PWR).
Input voltage may range from +5 V to +20 V. VR1 provides a +3.3 V fixed output limited to 800 mA.
Over-temperature and over-current limit built into the voltage regulator provides limited protection from
damage due to excessive stresses.
10
shows the PWR_SEL header.
Power (OFF/ON) Switch
Power Select
PWR_SEL
Violating the USB specification will cause the USB bus to disconnect. This
will cause the board to reset.
VB
VB
PWR_SEL
PWR_SEL
OFF/ON
OFF/ON
VDD
VDD
Demonstration Board for Freescale MCF5211, Rev. 1
Figure
Figure 6. PWR_SEL Option Header
CONFIGURATION
OFF—Input power source disconnected from upper voltage rail
ON—Input power source connected to upper voltage rail
Select power input from USB-BDM
Select power input from VR1
5, connects and disconnects all input voltage sources to the board.
Figure 5. OFF/ON Switch
CAUTION
Freescale Semiconductor