SAM9X25 Atmel Corporation, SAM9X25 Datasheet - Page 167
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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
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- Download datasheet (2Mb)
8.7
ARM DDI0198D
CPBURST
The CPBURST signal is used by the external coprocessor to indicate the number of
words to be transferred in an LDC or STC operation. CPBURST is used by the
ARM926EJ-S memory system to optimize LDC/STC instructions that access either
noncachable or nonbufferable regions of memory. The encoding of CPBURST is
shown in Table 8-2.
The encoding for a single word transfer and an unknown number of transfers is the
same. If CPBURST is set to b0000 for an STC or LDC operation, and this results in an
access to either a noncached or nonbuffered region of memory, then any resultant AHB
bus transfers are performed as individual nonsequential accesses.
CPBURST is driven by external coprocessors in the same cycle as the CHSDE
response. This must be driven to b0000 at all other times. An example of a transfer that
uses CPBURST is shown in Figure 8-9 on page 8-12.
Copyright © 2001-2003 ARM Limited. All rights reserved.
CPBURST[3:0]
b0000
b0001
b0010
…
b1110
b1111
Table 8-2 CPBURST encoding
Number of words
to transfer
1 word or unknown
2 words
3 words
…
15 words
16 words
Coprocessor Interface
8-11
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