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AT32UC3A0512 Datasheet(PDF) 82 Page - ATMEL Corporation |
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AT32UC3A0512 Datasheet(HTML) 82 Page - ATMEL Corporation |
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82 / 98 page  82 AT32UC3A (data read or code fetch) the second half (last 256 kB) of the flash may fail. This may lead to an exception or to other errors derived from this corrupted read access. Fix/Workaround Flashc WP, EP, EA, WUP, EUP commands: these commands must be issued from RAM or through the EBI. After these commands, read twice one flash page initialized to 00h in each half part of the flash. 15.4.6 PDCA 1. Wrong PDCA behavior when using two PDCA channels with the same PID. Workaround/fix The same PID should not be assigned to more than one channel. 15.4.7 TWI 1. The TWI RXRDY flag in SR register is not reset when a software reset is performed. Fix/Workaround After a Software Reset, the register TWI RHR must be read. 15.4.8 SDRAMC 1. Code execution from external SDRAM does not work Code execution from SDRAM does not work. Fix/Workaround Do not run code from SDRAM. 15.4.9 GPIO 1. Some GPIO VIH (input high voltage) are 3.6V max instead of 5V tolerant Only 11 GPIOs remain 5V tolerant (VIHmax=5V):PB01, PB02, PB03, PB10, PB19, PB20, PB21, PB22, PB23, PB27, PB28. Workaround/fix None. 15.4.10 USART 1. ISO7816 info register US_NER cannot be read The NER register always returns zero. Fix/Workaround None. 15.4.11 Processor and Architecture 1. LDM instruction with PC in the register list and without ++ increments Rp For LDM with PC in the register list: the instruction behaves as if the ++ field is always set, ie the pointer is always updated. This happens even if the ++ field is cleared. Specifically, the increment of the pointer is done in parallel with the testing of R12. Fix/Workaround None. 2. RETE instruction does not clear SREG[L] from interrupts. The RETE instruction clears SREG[L] as expected from exceptions. Fix/Workaround When using the STCOND instruction, clear SREG[L] in the stacked value of SR before returning from interrupts with RETE. 3. Exceptions when system stack is protected by MPU 32058KS–AVR32–01/12 |
Similar Part No. - AT32UC3A0512_14 |
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Similar Description - AT32UC3A0512_14 |
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