FTDI Community

Please login or register.

Login with username, password and session length.
Advanced Search  

News:

Welcome to the FTDI Community!

Please read our Welcome Note

Technical Support enquires
please contact the team
@ FTDI Support


New Bridgetek Community is now open

Please note that we have created the Bridgetek Community to discuss all Bridgetek products e.g. EVE, MCU.

Please follow this link and create a new user account to get started.

Bridgetek Community

Show Posts

You can view here all posts made by this member. Note that you can only see posts made in areas to which you currently have access.

Messages - Ket3r

Pages: [1]
1
General Discussion / FT4222 Spi Slave stops after 48 Bytes
« on: February 03, 2021, 12:46:50 PM »
Anyone else has the problem that you can only fill up the spi slave buffer in the ft4222 with 48 bytes?

I use the ft4222ev board (Rev D Chip) as an SPI Slave. This works fine until I try to write more than 48 Bytes of data to the chip. My Testsetup is a Ft4222EV (slave) connected with an C232HM-EDHSL-0 (master). I observe the SPI communication with an signal analyzer.

If I load the FT4222 with an byte array from 0 to 127 I only receive 0x00 after 48th byte. I attached the code that I use to load the FT4222. I also attached screenshots from the signal analyzer observing the operation.

Is it intended behavior?
Did I miss something in the datasheet?
Anyone else has the same problems?

Best regards,
Peter

Pages: [1]