Tool · Corners / MMC

PVT corners, managed once

Predefined PVT timing corner collections, from SS and FF to TT and more, so the same corner means the same process, voltage and temperature everywhere in your flow, instead of copy-pasted per block.

In plain words

What are PVT corners?

A corner is a combination of Process, Voltage and Temperature, e.g. slow-slow process at 0.72V and 25°C. Timing must be checked at several corners because the same design behaves differently at each. Ṛta manages those definitions as data.

Preset	Process	Voltage	Temperature	Typical use
SS_0P72V_25C	slow-slow	0.72 V	25 °C	setup / hold corner
FF_0P88V_0C	fast-fast	0.88 V	0 °C	hold analysis
TT_0P80V_25C	typical	0.80 V	25 °C	nominal analysis
SS_0P72V_125C	slow-slow	0.72 V	125 °C	max temperature

Why it matters

Corners as data, not folklore

When corners live only in someone's memory, one block gets 0.72V and another gets 0.75V for the "same" SS corner. When corners are managed, every block and every template references the same definition.

✓Consistency: the same corner means the same PVT everywhere.
✓Pair with generator: --operating-condition SS_0P72V_16C flows straight into rta generate.
✓Audit trail: corners are inspectable with one command.


$ rta corners list
  SS_0P72V_25C · FF_0P88V_0C · TT_0P80V_25C · SS_0P72V_125C

$ rta corners show ss
Preset: SS_0P72V_25C
  process:  slow-slow
  voltage:  0.72 V
  temp:     25 °C
  derate:   early 0.98 · late 1.02

Try it

Inspect your corners

List and inspect corners

$ rta corners list
$ rta corners show ss # partial match OK
$ rta generate -d my_block -c clk=10.0:sys_clk --operating-condition SS_0P72V_25C

Try it in the app ↗ All features