FPGA memory module specifications
Posted: Mon Jun 23, 2014 1:24 pm
Thanks so much for posting up the umdk as open source!
I've been re-acquainting myself with assembly with some mega drive programming, and have been wanting to move over to working on real hardware for some time, so this project has finally given me the motivation to do so!
I've been sourcing components to assemble my own lx9 and umdk boards, and I have a couple of questions regarding some components.
For the FPGA RAM chip, the PCB files and gerbers have listed IS42S16400-TSOP54, which is an ISSI part. The HaD.io page lists part MT48LC8M16A2P-7E.
These parts are identical in most specifications except for frequency and capacity.
The ISSI chip is listed as 8MiB at 143MHz
The Micron chip is listed as 16MiB at 133MHz
Is the 16MiB capacity the correct one? Also, how sensitive is the FPGA to 143MHz vs 133MHz memory?
Thanks very much once again for sharing your work!
I've been re-acquainting myself with assembly with some mega drive programming, and have been wanting to move over to working on real hardware for some time, so this project has finally given me the motivation to do so!
I've been sourcing components to assemble my own lx9 and umdk boards, and I have a couple of questions regarding some components.
For the FPGA RAM chip, the PCB files and gerbers have listed IS42S16400-TSOP54, which is an ISSI part. The HaD.io page lists part MT48LC8M16A2P-7E.
These parts are identical in most specifications except for frequency and capacity.
The ISSI chip is listed as 8MiB at 143MHz
The Micron chip is listed as 16MiB at 133MHz
Is the 16MiB capacity the correct one? Also, how sensitive is the FPGA to 143MHz vs 133MHz memory?
Thanks very much once again for sharing your work!