This document discusses multi mode multi corner (MMMC) analysis for chip design. It defines that a mode is a set of design parameters like clocks and timing constraints, and a corner captures process, voltage, and temperature variations. It provides examples of multiple modes like normal, sleep, and test modes and corners for temperature, voltage, process variations, and parasitic interconnects. The document gives an example of analyzing a chip with 4 modes under 3 process-voltage-temperature corners and 3 parasitic interconnect corners, showing 9 analysis cases.

1. Multi mode multi corner …(mmmc)
Presented By
sharief . shaik

2. MMMC:-
Mode:-
A mode is defined by a set of clocks, supply voltages, timing constraints,
and libraries. It can also have annotation data, such as SDF or parasitic files.
Many chip have multiple modes such as functional modes, test mode, sleep mode, and
Corner:-
A corner is defined as a set of libraries characterized for process, voltage, and
variations.
Corners are not dependent on functional settings; they are meant to capture variations in
manufacturing process, along with expected variations in the voltage and temperature of
environment in which the chip will operate

3. PVT CONDITIONS (CORNERS)
•Temperature: Best case, worst case, typical = 3 corners
• Process for cells: Fast-fast, slow-slow, fast-slow, slow-fast, typical = 5 corners
•Voltage: Best case, worst case, typical = 3 corners
•Process for interconnect: Max C, Min C, Max RC, Min RC, typical = 5 corners

4. EXAMPLE:-
consider a chip that has four operating modes (Normal, Sleep, Scan shift, Jtag),
and is being analyzed at three PVT corners (WC, BC, TYPICAL) and three parasitic
interconnect corners (Typical, Min C, Min RC)
PVT corner/
Parasitic corners
WC BC typical
Typical 1:
Normal/sleep/sca
n shift/Jtag
2
:Normal/sleep/sca
n shift
3:Normal/sleep
Min C 4: not required 5:Normal/sleep 6: not required
Min RC 7: not required 8:Normal/sleep 9: not required

6. THANK YOU