How to configure RTS and CTS of CY7C65215 as active low ?

[Justy]

Hi,

We are validating UART vendor mode flow control of CY7C65215 via CYUSB236 EVK with Cypress Linux SDK. As shown in attached test report, we found CTS of CY7C65215 is active HIGH which doesn't comply with RS/EIA-232 standard that defines RTS,CTS as active low.

The non-standard CTS behavior of CY7C65215 causing it failing to receive data from other standard active low UART devices as RTS/CTS flow control is enabled.

Could you help provide methods for configuring RTS/CTS of CY7C65215 as active low ?

Best Regards,

Justy Huang

[MallikaK_22 · Accepted solution]

Hi,

Please refer to the following KBA: https://community.infineon.com/t5/Knowledge-Base-Articles/Default-Configuration-of-UART-Pins-in-USB-...

Regards,

Mallika

[Justy]

Hi MallikaK_22,

The KBA you provided only mentions CY7C65213 instead of CY7C65215.

Could you help check whether CY7C65215 can change RTS/CTS polarity ?

Best Regards,

Justy Huang 

[MallikaK_22]

Hi Justy,

Yes, it's valid for CY7C65215.

Regards,

Mallika

[Justy]

Hi Mallika,

As described in KBA229765, CY7C65213 supports to change polarities of the UART pins (DCD, RI, RTS, CTS, DTR, and DSR) .

Does CY7C65215 support to change polarities of UART pins ?

Best Regards,

Justy Huang

[MallikaK_22]

Hi,

Yes, it does.

Regards,

Mallika