Other Parts Discussed in Thread: TL16C752D
Hello,
I have an old design using TL16C752B. The device is connected to a Ti DSP to provide two additional uarts both of which operate as 115k2 data pumps (i.e. no flow control) with interrupts.
Using the obsoleted 'B' part my design works perfectly.
If I replace the 'B' part on a working board with either a 'C' or a 'D' part then no uart traffic is generated.
I'm yet to debug the code running on the DSP, but by analysing the datasheets I cannot see any reason why the 'C' or 'D' parts wouldn't work. I'm running all the parts from a 3.3V supply using a 24 MHz external clock.
1) Do you have any idea why the UART might not work (it could be an identification routine in the code, but as there is no device id I can't see this)
2) In the described mode what is the difference between the 'C' and 'D' variants (other than the obvious package variant and temperature variant, and different UART speed vs supply voltage differences)
3) I found this forum response 'Difference between TL16C752D and TL16C752B' which basically indicates that what I'm tyring to do should just work.
Thanks,
Paul