AM3357: PROFIBUS pin use

Hi,

I have a question about AM335x PROFIBUS application.

I guess the following pins of AM335x(ZCZ) are used for PROFIBUS.
1. C13 pin in mode5 "PR1_PRU0_PRU_R30[5]" as Profibus TX GPIO function
2. D16 pin in mode5 "pr1_uart0_rxd" as Profibus UART_RX function
3. D15 pin in mode5 "pr1_uart0_txd" as Profibus UART_tX function

I have following question:
Q1. Are there any other pins used for Profibus?
Q2. B16 pin also supporting "pr1_uart0_rxd".
    Can I change to this pin from D16 for Profibus UART_RX function?
    Or do I must use D16 pin?

Q3. A16 pin also supporting "pr1_uart0_rxd".
    Can I change to this pin from D15 for Profibus UART_TX function?
    Or do I must use D15 pin?

best regards,
g.f.