CC3200: CC32xx in AP mode: how to set Wi-Fi rate ?

Hello.

I need to force CC32xx device to 1-Mbps rate with DSSS.

I know how to do it in raw transceiver mode.

I know how to do it in STA mode (just force AP (when it's not cc32xx device) to 1-Mbps mode).

But how to force CC32xx to use 1-Mbps rate in AP mode ?

I  don't need high speed of connection, i need max range.