SAM9X25 Atmel Corporation, SAM9X25 Datasheet - Page 82

• Manufacturer Part Number: SAM9X25
• Manufacturer: Atmel Corporation

Specifications of SAM9X25

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Can: 2
• Lin: 4
• Ssc: 1
• Ethernet: 2
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR/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

Memory Management Unit
3.2.10
3-18
31
31
31
31
31
31
Translating small page references
Coarse page table base address
Coarse page table base address
Translation base
Translation base
Page base address
Page base address
Figure 3-11 shows the complete translation sequence for a 4KB small page.
If a small page descriptor is included in a fine page table, the upper two bits of the page
index and low-order two bits of the fine page table index overlap. Each fine page table
entry for a small page must therefore be duplicated four times.
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 11 10 9 8 7 6 5 4 3 2 1 0
12 11
AP3 AP2 AP1 AP0 C B 1 0
Figure 3-11 Small page translation from a coarse page table
10 9 8
10 9
Table index
Table index
L2 table index
Domain
Page index
5 4 3 2 1 0
1
Modified virtual address
20 19
2 1 0
2 1 0
0 0
0 1
0 0
0
0
table index
Level two
12 11
Page index
ARM DDI0198D
0