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参数资料
| 型号： | EVB51JM128 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 11/23页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR MCF51JM128 MCU |
| 产品培训模块： | Flexis JM Family Flexis JM™ USB Connectivity USB Controller Continuum |
| 标准包装： | 1 |
| 系列： | ColdFire® |
| 类型： | MCU |
| 适用于相关产品： | MCF51JM128 |
| 所含物品： | 评估板 |
| 产品目录页面： | 734 (CN2011-ZH PDF) |
| 相关产品： | MCF51JM128VLD-ND - IC MCU 128/16K FLASH/SRAM 44LQFP MCF51JM128VLH-ND - IC MCU 128/16K FLASH/SRAM 64LQFP MCF51JM128VQH-ND - IC MCU 128/16K FLASH/SRAM 64QFP |
E V B 5 1 J M 1 2 8
U S E R
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F E B R U A R Y
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2 0 0 8
VREFL Option Header
The VREFL option header connects the target device VREFL input to the EVB digital ground
by default. This option header may be used to apply ultra clean ground or to measure input
current under operating conditions.
VX_EN Option Header
The VX_EN option header is a 2-pin jumper that connects the target-board voltage rail to IO
connector position J1A-1. IO connector position J1A-3 connects directly to the ground plane.
This input requires a regulated +3.3V voltage source. This power input is decoupled to mini-
mize 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 PWR connector as damage to the board
may result.
Power may be sourced to off-board circuitry through the MCU_PORT. The current limitation of
the on-board regulator must be considered when attempting to source power to external cir-
cuitry. Excessive current drain may damage the target board or the on-board regulator. The
figure below shows the VX_EN option header connections.
Figure 5: 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. Damage to the board may result.
NOTE : Do not exceed available current supply from on-board regulator when sourcing power
through connector J1 to external circuitry.
RESET Switch
The RESET switch allow the manual application of the RESET* signal. Application of RESET
halts the current operation and initializes internal registers to their default state. The previous
operating state of the MCF51JM128 will be lost.
External reset may also be applied directly to the RESET * signal at connector J1A-4.
10
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