Confirmed! twice as many chips, each twice as wide and twice as deep. Yay for bigger and better!
iBOB: 2x 36-bit SRAM x 18Mb ROACH-1: 2 x 18-bit QDR x 36Mb (or 72Mb, depending on what Mo's populated) ROACH-2: 4 x 36-bit QDR x 72Mb (or 144Mb, depending on what Mo's populating) Jason On 06 Feb 2013, at 01:58, G Jones wrote: > I'm pretty sure they're twice as wide to keep up with the increased > processing throughput possible with the bigger FPGA. > > On Tue, Feb 5, 2013 at 3:10 PM, David MacMahon > <dav...@astro.berkeley.edu> wrote: >> When I place a QDR yellow block in a ROACH model, the "data out" port is 36 >> bits wide. In a ROACH2 model, the QDR "data out" port is 72 bits wide. The >> "data in" port seems to double in expected width as well on ROACH2 as >> compared to ROACH. >> >> Why the dramatic interface change for ROACH2? Are the data ports on the >> ROACH2 QDR chips really twice as wide as on the ROACH QDR chips or has the >> QDR use pattern changed for ROACH2 or ??? >> >> Thanks, >> Dave >> >> >
