Technical data

Functional Description
MVME2502 Installation and Use (6806800R96B)
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4.6.2 SPI Flash Programming
The MVME2502 has three headers: a 10-pin header for SPI Flash programming, an 80-pin
header for the JTAG connectivity and a 20-pin JTAG header for ASSET hardware connectivity.
The following options are used to program the onboard flash:
 Using onboard SPI header - The MVME2502 uses the 10-pin header with a Dual SPI Flash in-
circuit programming configuration. The pin connection is compatible with DediProg SPI
Universal Pin Header.
 Using 60-pin external JTAG header - An external JTAG board with a JTAG multiplexer is
compatible with the MVME2502 and can be attached using an external cable. It can be
used to update the boot loader in the field. Using this method, programming can be done
through the JTAG interface or by using the dedicated SPI Flash programming header on the
JTAG board.
 Factory Pre-Programming - Programming the SPI Flash usually takes a while. Ideally, the
SPI Flash should be pre-programmed in the factory before shipment.
 ICT Programming - This programming is done on exposed test points using a bed of nails
tester.
4.6.3 Firmware Redundancy
The MVME2502 uses two physically separate boot devices to provide boot firmware
redundancy. Although the P2020 provides four SPI Bus chip-selects, the P2020 is only capable
of booting from the SPI Device controlled by Chip Select 0. External SPI multiplexing logic is
implemented on the MVME2502 to accommodate this chipset limitation.
The board power should be switched on before programming. The switch S2-8 should also be
powered on to successfully detect the SPI Flash chip.