SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 83

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

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

3.2.11
ARM DDI0198D
31
31
31
31
31
31
Translating tiny page references
Fine page table base address
Fine page table base address
Translation base
Translation base
Page base address
Page base address
Figure 3-12 shows the complete translation sequence for a 1KB tiny page.
Page translation involves one additional step beyond that of a section translation. The
first-level descriptor is the fine page table descriptor and this is used to point to the
first-level descriptor.
Translation table base
Second-level descriptor
First-level descriptor
Physical address
Copyright © 2001-2003 ARM Limited. All rights reserved.
14 13
14 13
31
12
12 11
11
10 9
10 9
Table index
Table index
9 8
L2 table index
Figure 3-12 Tiny page translation from a fine page table
Domain
Page index
6 5 4 3 2 1 0
5 4 3 2 1 0
AP
1
C B 1 1
Modified virtual address
20 19
2 1 0
2 1 0
0 0
1 1
0 0
0
0
table index
Level two
10 9
Memory Management Unit
Page index
3-19
0