Hello,

Yes you can use FT4222_SetClock to set the system clock to 80MHz, then use FT4222_SPIMaster_Init and set clock_div to CLK_DIV_2 (1/2 System Clock) which should give 40MHz on SCK.

Please make sure you are using the latest version of LibFT4222:

https://ftdichip.com/software-examples/ft4222h-software-examples/

And reference AN_329 User Guide for LibFT4222.

Best Regards,
FTDI Community

Hello,

I can confirmed that the maximum SCK in SPI Master mode is 40MHz.

We will update the UMFT4222EV datasheet.

Best Regards,
FTDI Community

Hello,

This issue has been root caused.

Device manager can show “FTDI CHIP” as the driver provider.
This means that, this driver can be installed by the installer provided in the package.
 
In most of the cases, the installer is not required and WinUSB driver gets installed automatically.

What we have observed is, the issue happens when the installer in the package is executed. The issue is due to GUID mismatch.
The installer package is using a different ID, and this was causing the issue.
 
We have updated the installer files to use the Microsoft default GUID so that the application can work independent of driver version.

The updated package has been uploaded to our SFTP server.
 
1.   Please uninstall the existing drivers from device manager.
2.   Use the drivers from updated package.
3.   Install the drivers either from device manager or by using the installer in the package.

Please contact us if you would like to receive a beta of this update.

Best Regards,
FTDI Community

Hi Tony,

The default for these GPIO pins is TriSt-PU. See table 5.1 in FTDI Device Input Output pin States.

what are you planning on connecting the GPIOH pins to? have you tried connecting the pins to a slave device and performing a GPIO read?

Best Regards
FTDI Community

Hello,

Please confirm which version of the D2xx driver and LibFT4222 that you are using?

Are you using custom FT4222H hardware? Do you see the same issue with our UMFT4222EV-D?

Could the I2C slave be at fault rather than the FT4222H I2C master?

When this happens maybe you can perform a software reset rather than having to force quit or restart?
See FT4222_ChipReset API. You can also try these D2xx based APIs:

FT_Purge
FT_ResetDevice
FT_ResetPort
FT_Rescan
FT_Reload
FT_CyclePort

Best Regards,
FTDI Community

Hello,

The extra bytes may be due to lack of biasing on the RS485 transceiver. If you could email into support1@ftdichip.com we can share the RS485 biasing schematic that will be able to help you.

Best Regards
FTDI Community 

Hi,

Number 1 is just the general configuration of the device. Number 2 is to enable the GPIOs. Have a look at section 3.1 of AN_412 FT600/FT601 Bridge Chips Integration.

This goes over the configuration modes of FT600 with section 3.1.5 focusing on the GPIO configuration.

We have a FT60x configuration programmer that you can use. You can find it here along with the AN_370 FT60X Configuration Programmer User Guide.

Best Regards
FTDI Community

Hello All,

LibMPSSE 1.0.5 fixes all known issues and is available on our website:

https://ftdichip.com/software-examples/mpsse-projects/

Best Regards,
FTDI Community