clarification needed regarding the TWR board(SCH 26185)

[senthilvel]

hello team ,

We are trying to send some data via the RS232 port using the UART peripheral. In the schematics (SCH 26185) it shows that the RS232 port is attached to UART 1 but while initializing the UART 1 if we give the base address of UART 1 (4006_B000h) as provided in the K70 Sub-Family Reference Manual it is not working . However it works when we give the base address of UART 2(4006_C000h). We suspect that UART 2 is only connected and there seems to be TYPO in the schematics.

Can you please confirm which UART (UART 1 or UART 2) is connected to RS232? I have attached the relevant section of the schematics.

Also in our project we need to use UART0 are there any procedure to use UART0 to transmit and receive the data?

[senthilvel]

Hello team,

A gentle reminder do you have any updates on this issue?

[Robin_Shen]

Hi senthil,

Sorry for the late reply.

The UART2 of K70 is connected to the RS232.

The UART2_TX and UART2_RX of K70 is connect to UART1_TX(A44) and UART1_RX(A43) of TWR-SER2 board. Below image can be found in TWR-K70F120M-SCH_C.pdf.

The TWR-ELEV and TWR-SER2 boards are not only designed for TWR-K70F120M. So the name may different.

UART0 and UART1 modules operate from the core/system clock, all other UART modules operate from the bus
clock. So the driver code of UART1 can be used for UART0.

Best Regards,

Robin