TMS320F28069: Write OTP memory fields

Part Number: TMS320F28069

Hi,
I want to update the firmware on my TMS320F28069 via CAN bus, since now I have been using a Debug probe or SCI (C2Prog app).
I'm using the Stand-Alone Boot Mode, and so far I know, I need the pin TRST=0, then GPIO37 and GPIO34 to 1, and later the CPU checks OTP_KEY and OTP_BMODE to select the Boot Mode (for CAN Boot should be 0x005A and 0x0007, respectively). grafik.png
My problem is I don't know how to write this OTP memory registers. Could someone please explain me how should I do it? They have actually the value 0xFFFF (factory setting), so weren't written yet.
Thanks,
Sergio