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M 5 2 2 1 0 D E M O
U S E R
G U I D E
A U G U S T
2 1 ,
2 0 0 7
Figure 6: +5V_SEL Option
VUSB
VBDM
VIN
?
?
?
?
?
?
Selects power input from miniAB USB connector
Selects power input from integrated USB BDM *
Selects power input from PWR connector
* indicates default shipping configuration
VX_EN
A 2-pin option header, VX_EN, connects input J1-1 directly to the +3.3V rail. J1-3 is connected
directly to the ground plane. This input requires a regulated +3.3V voltage source. This power
input is decoupled to minimize noise input but is not regulated. Also, no protection is applied
on this input and damage to the target board may result if over-driven. Do not attempt to
power the target board through this connector while also applying power through the USB
BDM or the PWR connector as damage to the board may result.
NOTE
Do not exceed available current from the USB BDM or the on-board regulator when sourcing
power through connector J1 to external circuitry.
Power may be sourced to off-board circuitry through the J1 connector. The current limitation of
the USB bus or the on-board regulator must be considered when attempting to source power
to external circuitry. Excessive current drain may damage the target board, the host PC USB
hub, or the on-board regulator. The figure below details the VX_EN option header connec-
tions.
Figure 7. VX_EN Option Header
VX_EN
ON
Enable power connection to connector J1
?
?
OFF
Disable power connection to connector J1
VX_EN
CAUTION
Do not apply power to connector J1 while also sourcing power from either the PWR connector
of the USB BDM circuit. Damage to the board may result.
USB OTG Power
The M52210DEMO may be powered from voltage input through the miniAB USB connector.
The DEMO board is also designed to provide power through the miniAB connector. This al-
lows the board to act as either Host or Peripheral.
Power output to the USB MAB connector is provided by a high-side switch located at U2. This
device provides the +5V output necessary for proper operation of the bus when the board is in
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相关代理商/技术参数
M52210DEMO 制造商:Freescale Semiconductor 功能描述:MCF5221X and MCF521XX ColdFire
M52211EVB 功能描述:开发板和工具包 - COLDFIRE KIRIN 0 FULL FEATURED EV RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V
M52221DEMO 功能描述:开发板和工具包 - COLDFIRE MCF52221 DEMO BOARD RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V
M52221DEMO 制造商:Freescale Semiconductor 功能描述:MCF52221 Demonstration Board
M52223EVB 功能描述:开发板和工具包 - COLDFIRE MCF52223 EVALUATION BOARD RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V
M52223EVB 制造商:Freescale Semiconductor 功能描述:MCF52223 EVALUATION BOAR
M5222FP 制造商:Panasonic Industrial Company 功能描述:IC
M52230DEMO 功能描述:开发板和工具包 - COLDFIRE MCF52230 LOW COST EVALUA RoHS:否 制造商:Freescale Semiconductor 产品:Development Kits 工具用于评估:MCF53017 核心:ColdFire V3 接口类型:Ethernet, UART, USB 工作电源电压:12 V