Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet

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SAM9M10 [DATASHEET]

6355F–ATARM–12-Mar-13

• RCMR.START = Start on falling edge/Start on Rising edge/Start on any edge

• RFMR.FSOS = None (input)

• TCMR.START = Receive Start

Unexpected delay of 2 or 3 system clock cycles is added to TD output.

None

Depending on LCD panels, the pen detect is noisy, leading to an unpredictable behavior.

An additional resistor solves the problem. Its value (between 100 kOhm and 250 kOhm) is to be tuned for the LCD
panel.

The USB may not start properly at first use after power-up. 

Booting out of the internal ROM fixes this issue because the workaround below is applied in the ROM Code.

There are two possible workarounds.

1.

Apply a hardware reset (NRST) after power-up.

Or

2.

Activate the PLLUTMI twice, following the procedure below:

– a- Start The UTMI PLL an wait for the PLL lock bit

– b- Disable the UTMI PLL and wait 10 μseconds minimum

– c- Restart the UTMIPLL and wait for the PLL Lock bit

Warning: When booting out of the internal ROM, this workaround is not implemented and therefore SAMBA will not
be functional.

Below is a possible implementation of the workaround: