SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 158

• 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

Debug Interface and EmbeddedICE-RT
7-20
Receiving a message from the debugger
Transferring a message from the debugger to the processor is similar to sending a
message to the debugger. In this case, the debugger polls the R bit of the debug comms
control register.
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•
When the comms data read register is free, data is written there using the JTAG
interface. The action of this write sets the R bit in the debug comms control register.
The processor polls the debug comms control register. If the R bit is set, there is data
that can be read using an MRC instruction to coprocessor 14. The action of this load
clears the R bit in the debug comms control register. When the debugger polls this
register and sees that the R bit is clear, the data has been taken, and the process can now
be repeated.
If the R bit is LOW, the comms data read register is free, and data can be placed
there for the processor to read.
If the R bit is set, previously deposited data has not yet been collected, so the
debugger must wait.
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ARM DDI 0165B