at32ap7002 ATMEL Corporation, at32ap7002 Datasheet - Page 46

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

10.2
10.3
32054DS–AVR32–10/07
Rev. B
Rev. A
33. USART - The DCD Signal is active high from the USART, but should be active low
34. MCI Transmit Data Register (TDR) FIFO corruption
Not sampled.
Not sampled.
The DCD signal is active high from the USART, but should be active low.
Fix/Workaround
An inverter should be added on this line on the PCB.
If the number of bytes to be transmitted by the MCI is not a multiple of 4, the Transmit Data
Register (TDR) First In First Out data buffer control logic will become corrupted when trans-
mit data is written to the TDR as 32-bit values.
Fix/Workaround
Configure the MCI Mode Register (MR) to accept 8-bit data input by writing a 1 to bit 13
(FBYTE), and transfer each byte of the transmit data to TDR by right aligning the useful
value. This allows the number of bytes transferred into the TDR to match the number set up
in the BCNT field of the MCI Block Register (BLKR).
AT32AP7002
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