Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 127
SAM9G20
18.6.1 EBI Chip Select Assignment Register
Name:EBI_CSA
Access:Read/Write
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 CompactFlash Logic (first slot) 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 CompactFlash Logic (second slot) 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.
VDDIOMSEL: Memory voltage selection
0: Memories are 1.8V powered.
1: Memories are 3.3V powered.
IOSR: I/O Slew Rate Selection
Refer to Section 40.4.4 “I/O Slew Rates”.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––IOSRVDDIOMSEL
15 14 13 12 11 10 9 8
–––––––EBI_DBPUC
76543210
– – EBI_CS5A EBI_CS4A EBI_CS3A – EBI_CS1A –