<bvernoux>
azonenberg, do you confirm UCSC_OpenRAM
<bvernoux>
SKY130 is limited to max 40MHz ?
<bvernoux>
It is quite disappointing to be so slow do you have any idea (as there is some MCU with SRAM@130nm which reach more than that easily)
<tnt>
bvernoux: AFAIK he suspects that the io buffers played a large role in that limit. Which you wouldn't have for an internal user.
<bvernoux>
ha ok interesting
<bvernoux>
anyway I suspect 130nm will limit max speed to something like 64MHz ?
<tnt>
why ?
<tnt>
My Athlon 700 MHz was 180nm ...
<bvernoux>
yes will be interesting to see what can be reached with the power consumption ;)
<bvernoux>
We see for MCU like ARM Cortex they was limited to something like 64MHz with 130nm
<bvernoux>
So I think it shall be similar to on RISCV
<tnt>
"they" ?
<bvernoux>
especially for a good power consumption
<bvernoux>
not to be power hungry like Athlon/X86/x64 stuff ;)
<bvernoux>
yes RISCV & ARM are similar in term of performance
<tnt>
I sure hope to get above 64 MHz, that's slow as hell.
<bvernoux>
Yes but it is a tradeof between speed & power consumption too and 130nm also do not help
<tnt>
it's not even a tru 130nm process, more like 130/180 hybrid.
<bvernoux>
a must have for serious next gen stuff will be to have 45nm but we can always dream ;)
<bvernoux>
Anyway even with this hybrid 130/180 hyrbid stuff we could have some cool MCU I think probably limited to <100MHz but depending on peripherals features it could be interesting
<azonenberg>
bvernoux: Yeah it can definitely go faster
<azonenberg>
40ish MHz is the fastest i've pushed the current test chip. which is a lower bound on the usable performance of the IP in a proper test harness
<azonenberg>
I don't know how much more it can go, they have more test chips on the way that fix some of these issues