Kindly let me Know, After resetting at91sam9g20-cu processor, What is the status of the pins ? Whether HIGH or LOW?. INPUT or OUTPUT?

Where to get those details?. I have gone through the data sheets.

help regards,

Thenral

[quote="thenral007"]Kindly let me Know, After resetting at91sam9g20-cu processor, What is the status of the pins ? Whether HIGH or LOW?. INPUT or OUTPUT?[/quote]
all ports are configured as inputs with internal pull-up activated.

[quote="thenral007"]Where to get those details?. I have gone through the data sheets.[/quote]
the datasheet is your friend. at every peripheral you can find the chapter "...User Interface". at the beginning of this chapter you will find a summarize of all registers and at the last column you can find the reset status.

regards
gerhard

As Gerhard suggests, look at the manual and the reset state of registers.

Remember also that some pins may be probed for specific interfaces by RomBoot, and BMS may alter NOR memory interfaces. AT91BootStrap might look at specific pin states, and setup extended SDRAM buses, etc.

If you have some critical hardware attached, make sure it can see a power-on-reset type signal, and perhaps guard the functionality by driving a specific pin, or latching a state, once the system is up and running, rather than in indeterminate state as the power supplies sequence up.

[quote="CptTitanic"]As Gerhard suggests, look at the manual and the reset state of registers.

Remember also that some pins may be probed for specific interfaces by RomBoot, and BMS may alter NOR memory interfaces. AT91BootStrap might look at specific pin states, and setup extended SDRAM buses, etc.

If you have some critical hardware attached, make sure it can see a power-on-reset type signal, and perhaps guard the functionality by driving a specific pin, or latching a state, once the system is up and running, rather than in indeterminate state as the power supplies sequence up.[/quote]

Thank You