SAM9X25 Atmel Corporation, SAM9X25 Datasheet - Page 66
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
SAM9X25
Manufacturer Part Number
SAM9X25
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9X25.pdf
(45 pages)
3.SAM9X25.pdf
(1145 pages)
4.SAM9X25.pdf
(45 pages)
5.SAM9X25.pdf
(1325 pages)
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
- SAM9261 PDF datasheet
- SAM9X25 PDF datasheet #2
- SAM9X25 PDF datasheet #3
- SAM9X25 PDF datasheet #4
- SAM9X25 PDF datasheet #5
- Current page: 66 of 248
- Download datasheet (2Mb)
Memory Management Unit
3.1
3-2
About the MMU
The ARM926EJ-S MMU is an ARM architecture v5 MMU. It provides virtual memory
features required by systems operating on platforms such as Symbian OS, WindowsCE,
and Linux. A single set of two-level page tables stored in main memory is used to
control the address translation, permission checks, and memory region attributes for
both data and instruction accesses.
The MMU uses a single unified Translation Lookaside Buffer (TLB) to cache the
information held in the page tables.
To support both sections and pages, there are two levels of address translation. The
MMU puts the translated physical addresses into the MMU Translation Lookaside
Buffer TLB.
The MMU TLB has two parts:
•
•
The main TLB is a two-way, set-associative cache for page table information. It has 32
entries per way for a total of 64 entries. The lockdown TLB is an eight-entry
fully-associative cache that contains locked TLB entries. Locking TLB entries can
ensure that a memory access to a given region never incurs the penalty of a page table
walk. For more details of the TLBs see TLB structure on page 3-31.
The MMU features are:
•
•
•
•
•
•
•
The following subsections are:
•
•
•
Copyright © 2001-2003 ARM Limited. All rights reserved.
the main TLB
the lockdown TLB.
standard ARM architecture v4 and v5 MMU mapping sizes, domains, and access
protection scheme
mapping sizes are 1MB (sections), 64KB (large pages), 4KB (small pages), and
1KB (tiny pages)
access permissions for large pages and small pages can be specified separately for
each quarter of the page (subpage permissions)
hardware page table walks
invalidate entire TLB using CP15 c8
invalidate TLB entry selected by MVA, using CP15 c8
lockdown of TLB entries using CP15 c10.
Access permissions and domains on page 3-3
Translated entries on page 3-3
MMU program accessible registers on page 3-4
ARM DDI0198D
Related parts for SAM9X25
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B-P](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
![TDA4470](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
![ATF22V10B-25PC](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
![AT89C51ED2-IM](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
![AT24C01](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
![U6046B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: