ROM in a ASIC is bit-reversed
Posted: Thu Jan 08, 2009 5:14 pmHi There :
Last month we got the chip from TSMC-fab and most of the things are functioning properly.
We have used following ROM memory compiler to generate the ROM file.
**************************************************************************
*Compiler Version : TSMC MEMORY COMPILER 2006.05.00.c.100a
*Technology : 90 nm CMOS LOGIC Low Power LowK Cu 1P9M 1.2V High-vt ROM
*Memory Type : TSMC 90nm low power ROM
**************************************************************************
Due to some mistake in switch selection during memory generation,
ROM contents are stored in bit-reversed fashion in the chip.
1. Does the ROM in the chip, has any internal switch which can be changed to reverse the bits again ?
It would of great help, if you could help me in this regard.
Thanks in advance,
G S Naveen
2. Is there any way to reverse the bits at the chip level ?
Last month we got the chip from TSMC-fab and most of the things are functioning properly.
We have used following ROM memory compiler to generate the ROM file.
**************************************************************************
*Compiler Version : TSMC MEMORY COMPILER 2006.05.00.c.100a
*Technology : 90 nm CMOS LOGIC Low Power LowK Cu 1P9M 1.2V High-vt ROM
*Memory Type : TSMC 90nm low power ROM
**************************************************************************
Due to some mistake in switch selection during memory generation,
ROM contents are stored in bit-reversed fashion in the chip.
1. Does the ROM in the chip, has any internal switch which can be changed to reverse the bits again ?
It would of great help, if you could help me in this regard.
Thanks in advance,
G S Naveen
2. Is there any way to reverse the bits at the chip level ?