In the documentation for the BootROM api (SLUU225) it mentions hardware failsafe pins for the bq803xx, which will put the chip into BootROM mode at powerup even if there appears to be a valid flash program available (if the chip is unsealed and doesn't have the failsafe disabled, of course.)
Can anyone tell me what the equivalent pins are on the bq20z95? I'm in a situation where I need to use my own code to rewrite the dataflash, and I don't like the idea of bricking a chip if the flashing fails. My initial attempts left me with a chip in a bad state that I could only recover because I hadn't let it drop out of BootROM mode.
I know for a fact that the firmware includes the failsafe disable code, so there's a good chance the hardware is actually there, there is just no mention of it in the documentation. (And if the pins aren't there, shame on you, TI!)