CC2652R: How to set inter byte delay in the TX of UART

Hi TI Team,

I have a requirement to set 1ms delays between bytes to of TX in UART.

I am using the zed_switch_cc26x2lp of SDK simplelink_cc26x2_sdk_2_20_00_36/simplelink_zigbee_sdk_plugin_2_20_00_06.

Here is my uart setting: 

UART_init();
UART_Params_init(&uartParams);
uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_BINARY;
uartParams.readReturnMode = UART_RETURN_FULL;
uartParams.readTimeout = MSEC_TO_TICKS(10000);
uartParams.readEcho = UART_ECHO_OFF;
uartParams.baudRate = 250000;
Uhandle = UART_open(Board_UART0, &uartParams);

It seems that there is no mechanism to do in uartparams configuration.

How to set inter byte delay in the TX of UART?

Thanks and Regards,

Walter