Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet
Product codes
AT91SAM9X25-EK
319
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
25.7.6 EBI Chip Select Assignment Register
Name:
CCFG_EBICSA
Address:
0xFFFFDF20
Access:
Read/Write
Reset:
0x00000200
• EBI_CS1A: EBI Chip Select 1 Assignment
0: EBI Chip Select 1 is assigned to the Static Memory Controller.
1: EBI Chip Select 1 is assigned to the DDR2SDR Controller.
• EBI_CS3A: EBI Chip Select 3 Assignment
0: EBI Chip Select 3 is only assigned to the Static Memory Controller and EBI_NCS3 behaves as defined by the SMC.
1: EBI Chip Select 3 is assigned to the Static Memory Controller and the NAND Flash Logic is activated.
• EBI_DBPUC: EBI Data Bus Pull-Up Configuration
0: EBI D0–D15 Data Bus bits are internally pulled-up to the VDDIOM power supply.
1: EBI D0–D15 Data Bus bits are not internally pulled-up.
• EBI_DBPDC: EBI Data Bus Pull-Down Configuration
0: EBI D0–D15 Data Bus bits are internally pulled-down to the ground.
1: EBI D0–D15 Data Bus bits are not internally pulled-down.
• EBI_DRIVE: EBI I/O Drive Configuration
This allows to avoid overshoots and gives the best performance according to the bus load and external memories.
0: Low drive (default).
1: High drive.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
DDR_MP_EN
NFD0_ON_D16
23
22
21
20
19
18
17
16
–
–
–
–
–
–
EBI_DRIVE
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
EBI_DBPDC
EBI_DBPUC
7
6
5
4
3
2
1
0
–
–
–
–
EBI_CS3A
–
EBI_CS1A
–