SAM9XE256 Atmel Corporation, SAM9XE256 Datasheet - Page 172
SAM9XE256
Manufacturer Part Number
SAM9XE256
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9260.pdf
(290 pages)
2.SAM9261.pdf
(248 pages)
3.SAM9XE128.pdf
(860 pages)
4.SAM9XE128.pdf
(48 pages)
Specifications of SAM9XE256
Flash (kbytes)
256 Kbytes
Pin Count
217
Max. Operating Frequency
180 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)
2
Uart
6
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)
312
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)
1.65 to 1.95
Fpu
No
Mpu / Mmu
No / Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9260 PDF datasheet
- SAM9261 PDF datasheet #2
- SAM9XE128 PDF datasheet #3
- SAM9XE128 PDF datasheet #4
- Current page: 172 of 248
- Download datasheet (2Mb)
Instruction Memory Barrier
9.1
9-2
About the instruction memory barrier operation
Whenever code is treated as data, for example self-modifying code, or loading code into
memory, then a sequence of instructions called an Instruction Memory Barrier (IMB)
operation must be used to ensure consistency between the data and instruction streams
processed by the ARM926EJ-S processor.
Usually the instruction and data streams are considered to be completely independent
by the ARM926EJ-S processor memory system, and any changes in the data side are
not automatically reflected in the instruction side. For example if code is modified in
main memory then the ICache might contain stale entries. To remove these stale entries
part or all of the ICache must be invalidated.
Copyright © 2001-2003 ARM Limited. All rights reserved.
ARM DDI0198D
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