AT32UC3L064_11 ATMEL [ATMEL Corporation], AT32UC3L064_11 Datasheet - Page 100

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AT32UC3L064_11

Manufacturer Part Number
AT32UC3L064_11
Description
32-bit Atmel AVR Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
10.4.16
10.4.17
32099HS–12/2011
TC
ADCIFB
3. Open Drain mode does not work
4. BUSY bit is never cleared after writes to the Control Register (CR)
5. Incoming peripheral events are discarded during duty cycle register update
6. VERSION register reads 0x100
1. When the main clock is RCSYS, TIMER_CLOCK5 is equal to CLK_PBA
1. Pendetect in sleep modes without CLK_ADCIFB will not wake the system
2. 8-bit mode is not working
3. Using STARTUPTIME larger than 0x1F will freeze the ADC
Write to the duty cycle registers only directly after the Timebase Overflow bit in the status
register is set.
The open drain mode does not work.
Fix/Workaround
None.
When writing a non-zero value to CR.TOP, CR.SPREAD, or CR.TCLR when the PWMA is
disabled (CR.EN == 0), the BUSY bit in the Status Register (SR.BUSY) will be set, but never
cleared.
Fix/Workaround
When writing a non-zero value to CR.TOP, CR.SPREAD, or CR.TCLR, make sure the
PWMA is enabled, or simultaneously enable the PWMA by writing a one to CR.EN.
Incoming peripheral events to all applied channels will be discarded if a duty cycle update is
received from the user interface in the same PWMA clock period.
Fix/Workaround
Ensure that duty cycle writes from the user interface are not performed in a PWMA period
when an incoming peripheral event is expected.
The VERSION register reads 0x100 instead of 0x101.
Fix/Workaround
None.
When the main clock is generated from RCSYS, TIMER_CLOCK5 is equal to CLK_PBA and
not CLK_PBA/128.
Fix/Workaround
None.
The pendetect will not wake the system from a sleep mode if the clock for the ADCIFB
(CLK_ADCIFB) is turned off.
Fix/Workaround
Use a sleep mode where CLK_ADCIFB is not turned off to wake the part using pendetect.
Do not use the ADCIFB 8-bit mode.
Fix/Workaround
Use the 10-bit mode and shift right by two bits.
Writing a value larger than 0x1F to the Startup Time field in the ADC Configuration Register
(ACR.STARTUP) will freeze the ADC, and the Busy Status bit in the Status Register
(SR.BUSY) will never be cleared.
Fix/Workaround
AT32UC3L016/32/64
100

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