at32ap7002 ATMEL Corporation, at32ap7002 Datasheet - Page 40

• Manufacturer Part Number: at32ap7002
• Description: Avr 32 32-bit Microcontroller
• Manufacturer: ATMEL Corporation

10. Errata
10.1
32054DS–AVR32–10/07
Rev. C
1. SPI FDIV option does not work
2. SPI Chip Select 0 BITS field overrides other Chip Selects
3. SPI LASTXFER may be overwritten
4. SPI LASTXFER overrides Chip Select
Selecting clock signal using FDIV = 1 does not work as specified.
Fix/Workaround
Do not set FDIV = 1.
The BITS field for Chip Select 0 overrides BITS fields for other Chip selects.
Fix/Workaround
Update Chip Select 0 BITS field to the relevant settings before transmitting with Chip Selects
other than 0.
When Peripheral Select (PS) = 0, the LASTXFER-bit in the Transmit Data Register (TDR)
should be internally discared. This fails and may cause problems during DMA transfers.
Transmitting data using the PDC when PS=0, the size of the transferred data is 8- or 16-bits.
The upper 16 bits of the TDR will be written to a random value. If Chip Select Active After
Transfer (CSAAT) = 1, the behavior of the Chip Select will be unpredictable.
Fix/Workaround
- Do not use CSAAT = 1 if PS = 0
- Use GPIO to control Chip Select lines
- Select PS=1 and store data for PCS and LASTXFER for each data in transmit buffer.
The LASTXFER bit overrides Chip Select input when PS = 0 and CSAAT is used.
Fix/Workaround
- Do not use the CSAAT
- Use GPIO as Chip Select input
- Select PS = 1. Transfer 32-bit with correct LASTXFER settings.
AT32AP7002
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