Datasheet

394
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
23.6.2 Transfer Control Register
Name: TR_CTRL
Access: Read/Write
Reset: 0x00000000
• BTSIZE: Buffer Transfer Size
• TRWIDTH: Transfer Width Register
• IEN: Context Done Interrupt Enable (Active Low)
0: Bit DMAISR of CRCCU_DMA_ISR is set at the end of the current descriptor transfer.
1: Bit DMAISR of CRCCU_DMA_ISR remains cleared.
31 30 29 28 27 26 25 24
––––IEN– TRWIDTH
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
BTSIZE
76543210
BTSIZE
Value Name Description
0 BYTE The data size is 8-bit
1 HALFWORD The data size is 16-bit
2 WORD The data size is 32-bit