SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 202
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SAM9G20
Manufacturer Part Number
SAM9G20
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G20.pdf
(42 pages)
5.SAM9G20.pdf
(832 pages)
Specifications of SAM9G20
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
3
Usb Speed
Full Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
1
Uart
7
Ssc
1
Ethernet
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
Yes
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
95
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9261 PDF datasheet
- SAM9261 PDF datasheet #2
- SAM9261 PDF datasheet #3
- SAM9G20 PDF datasheet #4
- SAM9G20 PDF datasheet #5
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- Download datasheet (13Mb)
22.3
22.3.1
22.3.1.1
Table 22-2.
Table 22-3.
Table 22-4.
Notes:
202
27
27
27
Bk[1:0]
26
26
26
Bk[1:0]
Bk[1:0]
Application Example
1. M[1:0] is the byte address inside a 32-bit word.
2. Bk[1] = BA1, Bk[0] = BA0.
AT91SAM9G20
25
25
25
Software Interface
Bk[1:0]
Bk[1:0]
Bk[1:0]
32-bit Memory Data Bus Width
24
24
24
SDRAM Configuration Mapping: 2K Rows, 256/512/1024/2048 Columns
SDRAM Configuration Mapping: 4K Rows, 256/512/1024/2048 Columns
SDRAM Configuration Mapping: 8K Rows, 256/512/1024/2048 Columns
Bk[1:0]
Bk[1:0]
Bk[1:0]
23
23
23
Bk[1:0]
Bk[1:0]
22
22
22
Bk[1:0]
The SDRAM address space is organized into banks, rows, and columns. The SDRAM controller
allows mapping different memory types according to the values set in the SDRAMC configura-
tion register.
The SDRAM Controller’s function is to make the SDRAM device access protocol transparent to
the user.
user in correlation with the device structure. Various configurations are illustrated.
21
21
21
20
20
20
Row[12:0]
Row[11:0]
Table 22-2
19
19
19
Row[10:0]
Row[12:0]
Row[11:0]
18
18
18
Row[10:0]
Row[12:0]
Row[11:0]
17
17
17
Row[10:0]
Row[12:0]
to
Row[11:0]
16
16
16
Table 22-7
Row[10:0]
15
15
15
CPU Address Line
CPU Address Line
CPU Address Line
14
14
14
illustrate the SDRAM device memory mapping seen by the
13
13
13
12
12
12
11
11
11
10
10
10
9
9
9
8
8
8
Column[10:0]
Column[10:0]
Column[10:0]
Column[9:0]
Column[9:0]
Column[9:0]
7
7
7
Column[8:0]
Column[8:0]
Column[8:0]
Column[7:0]
Column[7:0]
Column[7:0]
6
6
6
5
5
5
4
4
4
6384E–ATARM–05-Feb-10
3
3
3
2
2
2
1
1
1
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
M[1:0]
0
0
0
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