SAM9R64 Atmel Corporation, SAM9R64 Datasheet - Page 66
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SAM9R64
Manufacturer Part Number
SAM9R64
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.SAM9260.pdf
(290 pages)
3.SAM9261.pdf
(248 pages)
4.SAM9R64.pdf
(903 pages)
5.SAM9R64.pdf
(52 pages)
Specifications of SAM9R64
Flash (kbytes)
0 Kbytes
Pin Count
144
Max. Operating Frequency
240 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
49
Ext Interrupts
49
Usb Transceiver
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
3
Adc Resolution (bits)
10
Adc Speed (ksps)
220
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
64
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)
1.08 to 1.32
Fpu
No
Mpu / Mmu
No / Yes
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
3
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- M40800 PDF datasheet
- SAM9260 PDF datasheet #2
- SAM9261 PDF datasheet #3
- SAM9R64 PDF datasheet #4
- SAM9R64 PDF datasheet #5
- Current page: 66 of 284
- Download datasheet (2Mb)
Programmer’s Model
2-20
Prefetch Abort
When a Prefetch Abort occurs, the ARM7TDMI processor marks the prefetched
instruction as invalid, but does not take the exception until the instruction reaches the
Execute stage of the pipeline. If the instruction is not executed, for example because it
fails its condition codes or because a branch occurs while it is in the pipeline, the abort
does not take place.
After dealing with the reason for the abort, the handler executes the following
instruction irrespective of the processor operating state:
This action restores both the PC and the CPSR, and retries the aborted instruction.
Data Abort
When a Data Abort occurs, the action taken depends on the instruction type:
•
•
•
After fixing the reason for the abort, the handler must execute the following return
instruction irrespective of the processor operating state at the point of entry:
This action restores both the PC and the CPSR, and retries the aborted instruction.
Single data transfer instructions (LDR and STR). If write back base register is
specified by the instruction then the abort handler must be aware of this. In the
case of a load instruction the ARM7TDMI processor prevents overwriting of the
destination register with the loaded data.
Swap instruction (SWP):
—
—
Block data transfer instructions (LDM and STM) complete. When write-back is
specified, the base register is updated.
If the base register is in the transfer list and has already been overwritten with
loaded data by the time that the abort is indicated then the base register reverts to
the original value. The ARM7TDMI processor prevents all register overwriting
with loaded data after an abort is indicated. This means that the final value of the
base register is always the written-back value, if write-back is specified, at its
original value. It also means that the ARM7TDMI core always preserves r15 in
an aborted LDM instruction, because r15 is always either the last register in the
transfer list or not present in the transfer list.
Copyright © 1994-2001. All rights reserved.
on a read access suppresses the write access and the write to the destination
register
on a write access suppresses the write to the destination register.
ARM DDI 0029G
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