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ZEUS Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue D 38
Expansion interfaces
There are three expansion interfaces on the ZEUS: SDIO, PC/104 and CompactFlash.
PC/104 and CompactFlash interfaces are connected to the PC card memory controller
of the PXA270 with the use of some ‘glue logic’ implemented in a CPLD (Xilinx
XC9536XL). There is a CPLD Firmware version/issue register that can be accessed at
the address 0x12000000.
CPLD ver/issue register [REG0]
Byte lane Most significant byte Least significant byte
Bit 15 14 13 12 11 10 9 8 [7:4] [3:0]
Field - - - - - - - - VER[3:0] ISSUE[3:0]
Reset X X X X X X X X Current Version Current Issue
R/W - - - - - - - - Read Only
Address 0x12000000