SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 255

• 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

ARM DDI 0165B
Table C-3 shows the bit allocations for scan chain 1.
The scan chain order is the same as for the ARM9TDMI. The unused bit is to retain
compatibility with ARM9TDMI.
The two control bits serve the following purposes:
•
•
•
•
While debugging, the value placed in the SYSSPEED control bit determines
whether the ARM9E-S synchronizes back to system speed before executing the
instruction. See System speed access on page C-26 for further details.
After the ARM9E-S has entered debug state, the first time SYSSPEED is
captured and scanned out, its value tells the debugger whether the core has
entered debug state from a breakpoint (SYSSPEED LOW), or a watchpoint
(SYSSPEED HIGH). If the instruction directly following one which causes a
watchpoint has a breakpoint set on it, then the WPTANDBKPT bit is set. This
situation does not affect how to restart the code.
For a read the data value taken from the 32 bits in the scan chain allocated for data
is used to deliver the RDATA[31:0] value to the core.
When a write is being performed by the processor the WDATA[31:0] value is
returned in the data part of the scanned out value.
Copyright © 2000 ARM Limited. All rights reserved.
Bit number
66
...
35
34
33
32
31
...
0
Table C-3 Scan chain 1 bit order
Function
RDATA[0]
/WDATA[0]
...
RDATA[31]
/WDATA[31]
Unused
WPTANDBKPT
SYSSPEED
INSTR[31]
...
INSTR[0]
Debug in depth
Bidir
Bidir
Bidir
-
Input
Input
Input
Input
Input
Type
C-15