Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
Product codes
AT91SAM9X35-EK
1278
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
Problem Fix/Workaround:
To prevent a SAM-BA execution issue, the USB device must be connected via a USB Full Speed hub to the PC.
At application level, the DLL can be re-initialized in the correct state by toggling the BIASEN bit (high -> low -> high) when
resuming from the Suspend mode.
resuming from the Suspend mode.
The BIASEN bit is located in the CKGR_UCKR register in PMC user interface.
The function below can be used to generate the pulse on the bias signal.
void generate_pulse_bias(void)
{
unsigned int * pckgr_uckr = (unsigned int *) 0xFFFFFC1C;
* pckgr_uckr &= ~AT91_PMC_BIASEN;
* pckgr_uckr |= AT91_PMC_BIASEN;
}
In the USB device driver, the generate_pulse_bias function must be implemented in the “USB end of reset” and “USB
end of resume” interrupts.
end of resume” interrupts.
50.5 Timer Counter (TC)
50.5.1 TC: The TIOA5 signal is not well connected
The TIOA5 enable signal is not well connected internally, it is shared with the TIOB5 enable signal.
TIOB5 is working normally.
TIOA5 is working normally in Capture Mode.
Waveform Mode is not available for TIOA5 if the TC_CMR.ETRGEDG bit is set to 1, 2 or 3.
Problem Fix/Workaround
None.
50.6 LCD Controller (LCDC)
50.6.1 LCDC: LCDC PWM is not usable
When slow clock is selected as the source clock to feed PWM with (CLKPWMSEL in LCDC_LCDCFG0), the output
waveform generated is corrupted. When the MCK is selected, the prescaler (PWMPS in LCDC_LCDCFG6) is not sized
to generate the PWM output in a range of 200 Hz - 1 kHz.
waveform generated is corrupted. When the MCK is selected, the prescaler (PWMPS in LCDC_LCDCFG6) is not sized
to generate the PWM output in a range of 200 Hz - 1 kHz.
Problem fix/Workaround
Use standalone PWM output instead of LCDC embedded PWM.