SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 45

• 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

2.2
2.2.1
2.2.2
ARM DDI 0165B
Processor operating states
Switching state
Interworking ARM and Thumb state
The ARM9E-S has two operating states:
ARM state
Thumb state
In Thumb state, the Program Counter (PC) uses bit 1 to select between alternate
halfwords.
Transition between ARM and Thumb states does not affect the processor mode or the
register contents.
You can switch the operating state of the ARM9E-S core between ARM state and
Thumb state using the
described in the ARM Architecture Reference Manual. For full details of the ARM9E-S
instruction set, contact ARM.
All exceptions are entered, handled, and exited in ARM state. If an exception occurs in
Thumb state, the processor reverts to ARM state. The transition back to Thumb state
occurs automatically on return from the exception handler.
The ARM9E-S allows you to mix ARM and Thumb code as you wish. For details see
Chapter 7 Interworking ARM and Thumb in the Software Development Kit User Guide.
Note
Copyright © 2000 ARM Limited. All rights reserved.
32-bit, word-aligned ARM instructions are executed in this state.
16-bit, halfword-aligned Thumb instructions.
BX
and
BLX
instructions, and loads to the PC. Switching state is
Programmer’s Model
2-3