Requirements

1
2
2
Requirements

• Existing Z-Dok interface
• 10G Ethernet SFP
• Free chips?
• Fast Memory
• More QDRII
• Large Memory for transient buffer
• DDR?
• External Processor

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ROACH2
4
ROACH2 Issues...

• FPGA choice
• Form factor
• Processor bus interface
• Monitoring of temperatures and voltages/currents
• Power supply
• ADC interface
• Number/type of memories
• 10Ge type/number
• Testing/programming
• General interfaces

5
FPGA choice

• Virtex6

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Form factor

• ATX I/O area is limiting
• 1U height is important
• Cooling

7
Processor and bus interface

• 32 bit would be nice... how nice exactly?
• AMCC availability?
• Changing?
• ARM??

8
Monitoring

• Temperature
• Fans
• Voltages
• Currents
• Remote access?

9
Power supply

• AC or DC?

10
ADC Interface

• Z-DOK likely best choice for now
• Serial I/F would need too many transceivers

11
Memories ...

• QDR II
• 36 bit or 18 bit?
• 2, 3, 4 or more?
• DDRn
• Can do 4 x QDRII 18 bit wide DDR with SX475T

12
10 Gigabit Ethernet

• Time to go SFP
• 6x 8x?
• 1 Gigabit from FPGA

13
Testing and programming

• Suggestion for a single USB device interface
  using FTDI USB-JTAG bridge
• Eval kit will be tested with ROACH
• Production testing via JTAG

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General interfaces

• I²C
• USB Host (1 x ?)
• Serial
• Ethernet control and monitoring
• 10/100
• IEEE 1588

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One possible configuration

• 1 DDR DIMM
• 4 x 18 bit wide QDRII's
• 2 x Z-DOK
• 8 x SFP
• Diff GPIO (40 pair)
• 32 bit processor bus
• 2 x 1G ethernet from FPGA
• Leaves 34 spare I/O's