R40008 Atmel Corporation, R40008 Datasheet - Page 154
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R40008
Manufacturer Part Number
R40008
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.R40008.pdf
(19 pages)
4.R40008.pdf
(20 pages)
Specifications of R40008
Flash (kbytes)
0 Kbytes
Pin Count
100
Max. Operating Frequency
75 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
256
Self Program Memory
NO
External Bus Interface
1
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
No
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Instruction Cycle Timings
6.7
6-12
Load register
The first cycle of a load register instruction performs the address calculation. During the
second cycle the data is fetched from memory and the base register modification is
performed, if required. During the third cycle the data is transferred to the destination
register, and external memory is unused. This third cycle can normally be merged with
the next prefetch cycle to form one memory N-cycle.
Either the base, or destination, or both, can be the PC, and the prefetch sequence is
changed if the PC is affected by the instruction.
The data fetch can abort, and in this case the destination modification is prevented. In
addition, if the processor is configured for early abort, the base register write-back is
also prevented.
The cycle timings are listed in Table 6-9 where:
•
•
•
c represents the current processor mode:
—
—
d=0 if the T bit has been specified in the instruction (such as LDRT) and d=c at
all other times
s represents the size of the data transfer shown by MAS[1:0] (see Table 6-10 on
page 6-13).
Copyright © 1994-2001. All rights reserved.
c=0 for User mode
c=1 for all other modes
ARM DDI 0029G
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