SAMA5D44_14 Datasheet, PDF (1144/1776 Pages) ATMEL Corporation – Atmel | SMART ARM-based Embedded MPU

38.14.16 HSMCI DMA Configuration Register
Name:
Address:
Access:
HSMCI_DMA
0xF8000050 (0), 0xFC000050 (1)
Read/Write
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
–
–
–
–
–
–
9
8
–
DMAEN
7
6
5
4
3
2
1
0
–
CHKSIZE
–
–
–
This register can only be written if the WPEN bit is cleared in the HSMCI Write Protection Mode Register.
• CHKSIZE: DMA Channel Read and Write Chunk Size
The CHKSIZE field indicates the number of data available when the DMA chunk transfer request is asserted.
Value
0
1
2
3
4
Name
1
2
4
8
16
Description
1 data available
2 data available
4 data available
8 data available
16 data available
• DMAEN: DMA Hardware Handshaking Enable
0: DMA interface is disabled.
1: DMA Interface is enabled.
Note: To avoid unpredictable behavior, DMA hardware handshaking must be disabled when CPU transfers are performed.
1144
SAMA5D4 Series [DATASHEET]
Atmel-11238A-ATARM-SAMA5D4-Datasheet_30-Sep-14