Specialty Memory Forum Discussions

Hello,

The customer is considering reducing the power consumption of equipment that is in standby mode for a long period of time.
The power supply to Sync SRAM cannot be stopped because it is shared with other devices.
Therefore, I'm thinking of stopping the clock signal from FPGA to SRAM to reduce power consumption.

1) What is the current consumption of SRAM in Standby: Clock stopped?
2) This SRAM has DOFF# (PLL turn off).
Is it possible to reduce power consumption by setting this pin to High as well?
What is the current consumption with Clock stopped and PLL turned off?

MPN: CY7C2265KV18-550BZXI

Best regards,

Naoaki Morimoto

I saw another discussion on this that had the same exact problem I have, but I was unable to respond. I also didn't see a solution. I am using the Chip CY7C4122KV13.  When Writing to the ibis model it is really noisy as if There is no termination. Reading from the model is ok. I am using Hyperlynx. The traces are 50 ohms. I have tried other similar memory models like DDR 3 and it simulates fine. When sending data from my FPGA controller model to the QDRIV memory model it is really noisy.

Is there another model for reading and writing. Is there an error in the Ibis model, or am I missing something?

We have

CY7C1412KV18   QDRII

i see that Xilinx supports only QDRII+

Do you provide a controller for QDRII and Xilinx ultrascale FPGA?

I'm using CY7C4122KV13-106FCXC in our design. We need simulation to verify the layout. We downloaded IBIS model from your website. However, we can't pass data write simulation. Your lib for DQ (POD1p2)  has only 3 options: QDRIV4122_1PXX_POD1p2DATAIO_60,QDRIV4122_1PXX_POD1p2DATAIO_50 and QDRIV4122_1PXX_POD1p2DATAIO_40. They are good for data read simulation. However, our sim would fail for write. I think when doing writing, ODT should be disabled and proper termination should be connected. So you should have DATAIO models for input simulation. Can you provide me for that?  More IBIS models for QDR4?

Hello,

We received some CY25422FSXI devices that according to the datasheet are field programmable BUT the devices we received are saying they have already been programmed. We received these devices from Cypress through our customer.

The datasheet(Page 12): http://www.cypress.com/file/137771/download ​

On page 12 of the datasheet there is a footnote 6 for the field programmable devices which states "The devices mentioned in this datasheet are available as factory-programmable parts and not as field-programmable parts, since the associated programming software is currently not available. Visit www.cypress.com to create a Technical Support case, so Cypress can provide a programming file (.jed file) that matches your requirements."

Is this saying that if we get a CY25422FSXI and CY25422FSXIT device that it is factory programmed and NOT field programmable device? The note is confusing but it might explain why I am getting the device is already programmed message. Please clarify.

The devices I have show this for the marking on the device itself:

CY25442

FSXI

7311036

Thanks in advance for your assistance.