参数资料
型号: MPC8349E-MITX-GP
厂商: Freescale Semiconductor
文件页数: 4/36页
文件大小: 0K
描述: KIT REFERENCE PLATFORM MPC8349E
标准包装: 1
系列: PowerQUICC II™ PRO
类型: MPU
适用于相关产品: MPC8349E
所含物品: 模块和其他硬件
相关产品: MPC8349ECZUAJFB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349ECVVAJFB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CZUAJFB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CZUAJDB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CZUAGDB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CVVAJFB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CVVAJDB-ND - IC MPU POWERQUICC II PRO 672TBGA
MPC8349CVVAGDB-ND - IC MPU POWERQUICC II 672TBGA
MPC8349ZUAJDB-ND - IC MPU PWRQUICC II 672-TBGA
MPC8349ZUAJFB-ND - IC MPU PWRQUICC II 672-TBGA
更多...
MPC8349E-mITX-GP Board
Figure 2 shows the reset circuitry.
SRESET from COP
TRST from COP
HRESET from COP
3.3 V
MAX811
SRESET to MPC8349E
TRST to MPC8349E
MPC8349E
10/100/1000 PHY
USB PHYs
MR
PORESET to MPC8349E
FLASH
Push Button
GND
Figure 2. Reset Circuitry of the MPC8349E
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Hard reset is generated either by the COP/JTAG port or the MPC8349E.
Power-on reset is generated by the Maxim MAX811 device. When MR is deasserted and 3.3 V is
ready, the MAX811 internal timeout guarantees a minimum reset active time of 150 ms before
PORESET is deasserted. This circuitry guarantees a 150 ms PORESET pulse width after 3.3 V
reaches the right voltage level, and this meets the specification of the PORESET input of
MPC834x.
COP/JTAG port reset provides convenient hard-reset capability for a COP/JTAG controller. The
RESET line is available at the COP/JTAG port connector. The COP/JTAG controller can directly
generate the hard-reset signal by asserting this line low.
Push button reset interfaces the MR signal with a debounce capability to produce a manual master
reset of the processor card.
Soft reset is generated by the COP/JTAG port. Assertion of SRESET causes the MPC8349E to
abort all current internal and external transactions and set most registers to their default values.
MPC8349E-mITX-GP Reference Design Platform User’s Guide, Rev. 0
Freescale Semiconductor
Preliminary—Subject to Change Without Notice
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