SAM9G46 Atmel Corporation, SAM9G46 Datasheet - Page 457
SAM9G46
Manufacturer Part Number
SAM9G46
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G46.pdf
(58 pages)
Specifications of SAM9G46
Flash (kbytes)
0 Kbytes
Pin Count
324
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
160
Ext Interrupts
160
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
2
Uart
5
Lin
4
Ssc
2
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
Yes
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
AES/DES
Sram (kbytes)
64
Self Program Memory
NO
External Bus Interface
2
Dram Memory
DDR2/LPDDR, SDRAM/LPSDR
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
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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30.7.2
Name:
Address:
Access:
Reset:
This register can only be written if the bit WPEN is cleared in
• COUNT: DDRSDRC Refresh Timer Count
This 12-bit field is loaded into a timer which generates the refresh pulse. Each time the refresh pulse is generated, a refresh
sequence is initiated.
SDRAM devices require a refresh of all rows every 64 ms. The value to be loaded depends on the DDRSDRC clock fre-
quency (MCK: Master Clock) and the number of rows in the device.
For example, for an SDRAM with 8192 rows and a 100 MHz Master clock, the value of Refresh Timer Count bit is pro-
grammed: (((64 x 10
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
31
23
15
–
–
–
7
DDRSDRC Refresh Timer Register
-3
)/8192) x100 x10
30
22
14
DDRSDRC_RTR
0xFFFFE804
Read-write
See
–
–
–
6
Table 30-16
29
21
13
–
–
–
5
6
= 781 or 0x030D.
28
20
12
–
–
–
4
COUNT
“DDRSDRC Write Protect Mode Register” on page
27
19
11
–
–
3
26
18
10
–
–
2
COUNT
25
17
–
–
9
1
SAM9G35
SAM9G35
470.
24
16
–
–
8
0
457
457
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