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TUSB3410 VCP with no EEPROM problem
I'm trying to implement the most basic interface with the TUSB3410, with no EEPROM, and using the TUSBWINVCP for a simple USB-Serial converter, but have not succeded.
I made the circuit, based on the EVM schematic and following datasheet guidelines.In a WinXP syste, I installed the driver package (TUSBWINVCP) and my system added the hardware, with no problems when I connected the board to an USB Port, shown in the Device Manager as "TUSB3410 Device (COM3)"
But when I try to send serial Data, using Hyperterminal, via this port (COM3), nothing gets out of the TUSB3410, on pin "SOUT / IR_OUT"
I have noticed that port P3.0 is toggling between 1 and 0 continuously at an estimated rate of 3-4 Hz.Is this output indication of something? (Good or else...?)
I'm using the latest TUSBWNVCP, in Windows the driver is reported as version 6.5.9007.0. and the chip has markings (TUSB3410 / 4BT / F340)
Any help will be greatly appreciated.
It’s odd that nothing is being shown at SOUT. Could you please double-check if everything properly connected at that section? Could you please use a loop-back connector and see if any char you type from hyper-term is echoed properly?
About IR_OUT, it’s expected that you won’t see any activity there since our default FW works for serial mode and IR mode can be used using a different FW build.
Regarding the P3.0, don’t worry about it our default FW toggles that port in order to enable it as a debugger output.
Thanks and Best Regards,
Many thanks for taking the time to address my problem.I checked the connections on my test board, and everything is ok, following the TI TUSB3410 UART DEMO BOARD schematic.I tried loopback between SIN (PIN 19) and SOUT (PIN 17) and still no data on SOUT.Pin numbers a for a VF (QFP) package.
Regarding your comment that I should see no activity in IR_OUT, in the datasheet I have, SOUT is the same pin as IR_SOUT, and SIN is the same as IR_SIN, is this correct or I am missing something?
Many thanks and best regards,
You are correct on the pin assignment (IR_SIN=SIN), but keep in mind that when using our default serial FW then you should name it SIN. In you schematic, do you have SIN connected through a 5K resistor to 3.3V? Also, SOUT should remain not connected.
I also noticed that all serial activity is being done through P3_0 (RXD) and P3_1 (TXD), they are connected to a MAX3221E. Do you have any kind of interface like this one? Please see attached image to this post (MAX-3221E.JPG).
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