SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 147

• Manufacturer Part Number: SAM9XE512
• Manufacturer: Atmel Corporation

Specifications of SAM9XE512

• Flash (kbytes): 512 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

20.3.2.2
Figure 20-5. Data Read Optimization in ARM Mode for FWS = 1
6254C–ATARM–22-Jan-10
Buffer (128bits)
Flash Access
ARM Request
Data To ARM
Master Clock
(32-bit)
Data Read Optimization
@Byte 0
XXX
XXX
XXX
The organization of the Flash in 128 bits is associated with two 128-bit prefetch buffers and one
128-bit data read buffer, thus providing maximum system performance. This buffer is added in
order to start access at the following data during the second read. This speeds up sequential
data reads if, for example, FWS is equal to 1 (see
Note:
Bytes 0-15
Bytes 0-3
@ 4
No consecutive data read accesses are mandatory to benefit from this optimization.
@ 8
4-7
@ 12
AT91SAM9XE128/256/512 Preliminary
8-11
Bytes 0-15
12-15
@ 16
Bytes 16-31
@ 20
16-19
Figure
@ 24
20-23
20-5).
24-27
@ 28
Bytes 16-31
28-31
@ 32
Bytes 32-47
@ 36
32-35
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