MPC8349E-MITX-GP Freescale Semiconductor, MPC8349E-MITX-GP Datasheet - Page 4

• Manufacturer Part Number: MPC8349E-MITX-GP
• Description: KIT REFERENCE PLATFORM MPC8349E
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC II™ PROr
• Type: MPUr

Specifications of MPC8349E-MITX-GP

• Contents: Module and Misc Hardware
• For Use With/related Products: MPC8349E
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MPC8349E-mITX-GP Board
Figure 2
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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.
HRESET from COP
shows the reset circuitry.
SRESET from COP
TRST from COP
MPC8349E-mITX-GP Reference Design Platform User’s Guide, Rev. 0
Figure 2. Reset Circuitry of the MPC8349E
3.3 V
MR
Preliminary—Subject to Change Without Notice
Push Button
MAX811
GND
PORESET to MPC8349E
FLASH
SRESET to MPC8349E
TRST to MPC8349E
10/100/1000 PHY
USB PHYs
MPC8349E
Freescale Semiconductor