MPC8313E-RDBC Freescale Semiconductor, MPC8313E-RDBC Datasheet - Page 49

• Manufacturer Part Number: MPC8313E-RDBC
• Description: BOARD CPU 8313E VER 2.2
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC II™ PROr
• Type: MPUr

Specifications of MPC8313E-RDBC

• Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MPC8313E

8.3
Set DIP switch S4 as OFF-OFF-OFF-ON (1110) and set DIP switch S3 as ON-ON-ON-OFF (0001). Note
that there is no boot image on NAND flash memory with the default shipment.
8.4
Some ATX power supplies may need a large 5-V loading to stabilize the 3.3-V output; otherwise, you may
observe the 3.3 V lowered to around 2.9 V–3 V. The consequence can be a periodic reset by the on-board
voltage monitoring circuit. For a workaround, you may take one of the following actions:
Starting from revision REVA2, a resistor loading for 5 V is added. It should work better with the ATX
power supply that requires large 5-V loading. If there is still a problem, simply apply one of the
workarounds presented here.
8.5
The PMC registers range from IMMR + 0x0B00 to IMMR + 0x0BFF. When this area is accessed in u-boot,
the RDB hangs up. It appears that the PMC block is related to the JTAG interface; TRST must not be pulled
down for normal operation of the PMC block. Possible workarounds are as follows:
9
Table 25
Freescale Semiconductor
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•
•
•
•
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Number
Rev.
0
1
2
Add a 5-V loading to the power supply, for example, attach a hard disk drive.
Change to another ATX power supply that does not require a large 5-V loading.
Use the power supply provided with the RDB package.
Attach a debugger to drive TRST high during normal operation.
Remove the pull-down resistor (R37) for TRST. Although this tested on some RDBs without any
problem, it violates the hardware specification. If it does not work on your RDB, use another
workaround.
This problem is fixed in REVA3
Revision History
provides a revision history for this document.
What is the hardware setting for boot from NAND Flash?
Some ATX power supplies do not work with the RDB?
Power management control (PMC) registers cannot be
accessed?
2/2007
4/2007
4/2007
Date
PowerQUICC™ MPC8313E Reference Design Board (RDB), Rev. 4
Initial public release.
Replaced a faulty table of contents and restructured sections of the document for clarity.
Added information to Section 8, Frequently Asked Questions (FAQs)
Table 25. Document Revision History
Substantive Change(s)
Revision History
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