at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 148

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

20.7
20.7.1
20.7.1.1
148
Implementation Examples
AT91SAM9G20 Preliminary
16-bit SDRAM
Software Configuration
The following hardware configurations are given for illustration only. The user should refer to the
memory manufacturer web site to check current device availability.
Hardware Configuration
The following configuration has to be performed:
The Data Bus Width is to be programmed to 16 bits.
The SDRAM initialization sequence is described in the “SDRAM device initialization” part of the
SDRAM controller.
• Assign the EBI CS1 to the SDRAM controller by setting the bit EBI_CS1A in the EBI Chip
• Initialize the SDRAM Controller depending on the SDRAM device and system bus frequency.
Select Assignment Register located in the bus matrix memory space.
(Not used A12)
A[0..14]
D[0..15]
CFIOR_NBS1_NWR1
SDCS_NCS1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A13
A14
A0
SDA10
SDCKE
SDCK
SDWE
BA0
BA1
CAS
RAS
1%6
1%6
SDA10
BA0
BA1
SDCKE
SDCK
CAS
RAS
SDWE
23
24
25
26
29
30
31
32
33
34
22
35
20
21
36
40
37
38
15
39
17
18
16
19
U1
U1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
BA0
BA1
A12
N.C
CKE
CLK
DQML
DQMH
CAS
RAS
WE
CS
TSOP54 PACKAGE
MT48LC16M16A2
MT48LC16M16A2
256 Mbits
VDDQ
VDDQ
VDDQ
VDDQ
VSSQ
VSSQ
VSSQ
VSSQ
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
VDD
VDD
VDD
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
VSS
VSS
VSS
2
4
5
7
8
10
11
13
42
44
45
47
48
50
51
53
1
14
27
3
9
43
49
28
41
54
6
12
46
52
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
6384B–ATARM–15-Dec-08
3V3
C1 1
C1 1
C2 1
C2 1
C3 1
C3 1
C4 1
C4 1
C5 1
C5 1
C6 1
C6 1
C7 1
C7 1