SAM9XE128 Atmel Corporation, SAM9XE128 Datasheet - Page 46
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SAM9XE128
Manufacturer Part Number
SAM9XE128
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 SAM9XE128
Flash (kbytes)
128 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)
16
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: 46 of 290
- Download datasheet (5Mb)
Programmer’s Model
2.3
2.3.1
2.3.2
2-4
Memory formats
Big-endian format
Little-endian format
The ARM9E-S views memory as a linear collection of bytes numbered in ascending
order from zero. Bytes 0 to 3 hold the first stored word, and bytes 4 to 7 hold the second
stored word, for example.
The ARM9E-S can treat words in memory as being stored in either:
•
•
In big-endian format, the ARM9E-S stores the most significant byte of a word at the
lowest-numbered byte, and the least significant byte at the highest-numbered byte.
Therefore, byte 0 of the memory system connects to data lines 31 to 24. This is shown
in Figure 2-1.
In little-endian format, the lowest-numbered byte in a word is the least-significant byte
of the word and the highest-numbered byte is the most significant. Therefore, byte 0 of
the memory system connects to data lines 7 to 0. This is shown in Figure 2-2 on
page 2-5.
Big-endian format
Little-endian format.
Copyright © 2000 ARM Limited. All rights reserved.
Higher address
Lower address
Bit
31
• Most significant byte is at lowest address
• Word is addressed by byte address of most significant byte
8
4
0
Figure 2-1 Big-endian addresses of bytes within words
24
23
9
5
1
16
15
10
6
2
8
11
7
7
3
0
ARM DDI 0165B
Word address
8
4
0
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