Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Hoja De Datos
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AT91SAM9M10-G45-EK
147
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
19.7.6.3
EBI Chip Select Assignment Register
Name:
CCFG_EBICSA
Access:
Read-write
Reset:
0x0007_0000
• 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 SDRAM 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 SmartMedia Logic is activated.
• EBI_CS4A: EBI Chip Select 4 Assignment
0 = EBI Chip Select 4 is only assigned to the Static Memory Controller and EBI_NCS4 behaves as defined by the SMC.
1 = EBI Chip Select 4 is assigned to the Static Memory Controller and the Compact Flash Logic Slot 0 is activated.
• EBI_CS5A: EBI Chip Select 5 Assignment
0 = EBI Chip Select 5 is only assigned to the Static Memory Controller and EBI_NCS5 behaves as defined by the SMC.
1 = EBI Chip Select 5 is assigned to the Static Memory Controller and the Compact Flash Logic Slot 1 is activated.
• EBI_DBPUC: EBI Data Bus Pull-Up Configuration
0 = EBI D0 - D15 Data Bus bits are internally pulled-up to the VDDIOM1 power supply.
1 = EBI D0 - D15 Data Bus bits are not internally pulled-up.
• EBI_DRIVE: EBI I/O Drive Configuration
This allows to avoid overshoots and give the best performances according to the bus load and external memories.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
DDR_DRIVE
EBI_DRIVE
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
EBI_DBPUC
7
6
5
4
3
2
1
0
–
–
EBI_CS5A
EBI_CS4A
EBI_CS3A
–
EBI_CS1A
–
Value
Drive configuration
Conditions
00
optimized for 1.8V powered memories with Low Drive
Maximum load capacitance < 30 pF
01
optimized for 3.3V powered memories with Low Drive
Maximum load capacitance < 30 pF
10
optimized for 1.8V powered memories with High Drive
Maximum load capacitance < 55 pF
11
optimized for 3.3V powered memories with High Drive
Maximum load capacitance < 55 pF