2

Requirements Existing Z-Dok interface 10G Ethernet – SFP+ Free chips? Fast Memory

More QDRII+

Large Memory for transient buffer DDR?

External Processor

ROACH2

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

FPGA choice

Virtex6

Form factor

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

Processor and bus interface

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

Monitoring

Temperature Fans Voltages Currents Remote access?

Power supply

AC or DC?

ADC Interface

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

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

10 Gigabit Ethernet

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

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

General interfaces

I²C USB Host (1 x ?) Serial Ethernet control and monitoring

10/100 IEEE 1588

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