AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 86
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AT91RM9200-CI-002
Manufacturer Part Number
AT91RM9200-CI-002
Description
IC ARM9 MCU 256 BGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheets
1.AT91RM9200-EK.pdf
(41 pages)
2.AT91RM9200-DK.pdf
(2 pages)
3.AT91RM9200-QU-002.pdf
(701 pages)
Specifications of AT91RM9200-CI-002
Core Processor
ARM9
Core Size
16/32-Bit
Speed
180MHz
Connectivity
EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
POR
Number Of I /o
122
Program Memory Size
128KB (128K x 8)
Program Memory Type
ROM
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
256-BGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
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Manufacturer
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13.3.1
Figure 13-3. LDR Opcode
Figure 13-4. B Opcode
13.3.1.1
86
AT91RM9200
Valid Image Detection
Example
31
31
1
1
1
1
1
1
28 27
28 27
0
0
The Bootloader software looks for a valid application by analyzing the first 32 bytes correspond-
ing to the ARM exception vectors. These bytes must implement ARM instructions for either
branch or load PC with PC relative addressing. The sixth vector, at offset 0x14, contains the size
of the image to download and the DataFlash parameters.
The user must replace this vector with his own vector.
Unconditional instruction: 0xE for bits 31 to 28
Load PC with PC relative addressing instruction:
An example of valid vectors:
In download mode (DataFlash, EEPROM or 8-bit memory in device with EBI integrated), the
size of the image to load into SRAM is contained in the location of the sixth ARM vector. Thus
the user must replace this vector by the correct vector for his application.
0
1
00
004
08
0c
10
14
18
1c
1
0
– Rn = Rd = PC = 0xF
– I==1
– P==1
– U offset added (U==1) or subtracted (U==0)
– W==1
1
I
24 23
24 23
P
0
ea00000b
e59ff014
e59ff014
e59ff014
e59ff014
00001234
e51fff20
e51fff20
U
0
W 1
20 19
B
LDR
LDR
LDR
LDR
LDR
LDR
Rn
16 15
0x2c
PC, [PC,20]
PC, [PC,20]
PC, [PC,20]
PC, [PC,20]
PC, [PC,-0xf20]
PC, [PC,-0xf20]
Offset (24 bits)
Rd
12 11
<- Code size = 4660 bytes
1768I–ATARM–09-Jul-09
0
0
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