TL16C752D: UART connection to TL16C752

Hi Ishiwata-san,

"- Create an RTS and enter it in the frame CTS. Is it okay?
The timing of RTS and CTS is as per 7.6 Timing Requirements?"

For this, you could probably just use the hardware flow control feature of the device. Section 8.3.1.2 discusses it there. The device will basically toggle the RTS pin for you if there is enough room to receive more bytes and will stop sending if CTS isn't active. You would just need to set bit 6 and 7 in the EFR register to '1'

"- What input timing for CD?
- What input timing for DSR?
- What input timing for RI?"

In most applications I see, they aren't used. I believe these lines are a bit more outdated than the rest. Most the time communication can be done using just the TX and RX lines (null modem). Sometimes, I see the RTS and CTS lines used. Is this something you really require? If so, I'll have to dig around to see if I can find some relative timing diagrams (I recall running into one in our internal database sometime back).

-Bobby

Hi Bobby-san

Thank you for your reply ans support.

RTS and CTS are not used. It doesn't control the flow of RS232C.
Connect with UART.
In this case, is the not used pin (CD, DSR, RI) GND or Open?

Best Regards,
Ishiwata

Hi Bobby-san

Thank you for your reply.

CD / DSR / RI pin pullup or pulldown the power supply.
Is it OK to connect CTS and RTS when using only the transmitter?

Best Regards,
Ishiwata