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P5040/P5020 Reference Design Board User Guide, Rev. 0
30
Freescale Semiconductor
Architecture
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CS0, CS1, or CS2 select NOR FLASH depending on “CFG_Vbank[0...2]”.
•
FPGA-generated signals are used to re-arrange internal addresses as per user configuration options
“CFG_LBMAP[0...3]”.
5.1.16.3
NAND FLASH
Micron NAND FLASH memory (MT29F4G08ABADAWP:D) has 512 MB and an 8-bit data width.
NAND FLASH is controlled by the FCM Local Bus.
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FLASH R/B output indicates the status of a device operation. This open drain output connects to
the P5040/P5020 LFR/B/LGPL4 line.
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CS0, CS2, or CS[4:6] select NAND FLASH as per “CFG_LBMAP[0...3]”.
5.1.16.4
PromJet Connector
A PromJet connector can be used for debugging purposes.
Perpiherals and embedded storage can be
connected to the PromJet superset connector. The 16-bit PromJet modules (FLASH memory emulators)
are available from Emutec. See www.emutec.com.
CS0 or CS1 select between PromJet FLASH and onboard FLASH as per “CFG_LBMAP[0...3]”.
5.1.17
Debug Features
The reference board provides a JTAG COP header and AURORA test points for debug purposes, using the
CodeWarrior USBTAP already installed in the system.
To upgrade the U-Boot stored on the NOR FLASH, use the CodeWarrior USBTAP tool.
5.1.18
Clock
For a description of the clock architecture, see
.”
5.1.19
Temperature Anode and Cathode
The P5040/P5020 has two pins, Temp_Anode and Temp_Cathode, connected to a thermal body diode on
the die that allow direct temperature measurement. The pins are connected to an ADT7461 thermal
monitor that allows direct die temperature readings with an accuracy of ±1 °C.
5.1.20
Power
For a description of the clock architecture, see
Section 5.3, “System Power Connections
.”
5.2
System Control Logic
The P5040/P5020RDB contains FPGA ngPIXIS that implements the following functions:
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Resets sequencing/timing as per COP/JTAG connections.
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Maps/re-maps P5040/P5020 local bus chip selects to FLASH, compact FLASH, and so on.