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! When the SW3 button is pressed:
All the LEDs light up together.
The D3 LED remains lit when SW3 is released.
The Flash uploader is activated.
! The SW4 button is reserved for future use.
! When no buttons are pressed:
Branch at address 0x01006000.
The Angel Debug Monitor starts from this address by recopying itself in internal
SRAM.
3.3
Programmed
Default Memory
Mapping
Table 3-1 defines the mapping defined by the boot program.
Table 3-1. Memory Map
Part Name
U1A
U2 - U3 (1)
Start Address
0x01000000
0x02000000
End Address
0x011FFFFF
0x0203FFFF
Size
2M Bytes
256K Bytes
Device
Flash
AT49BV162A
SRAM
Note:
1. If fitted on the board
U1A is divided in two parts. This is done by the jumper JP1. In the upper part, the first
sector (sector 24) at address 0x01100000 must be programmed with a boot sequence
to be debugged. This sector can be mapped at address 0x01000000 (or 0x0 after a
reset) when the jumper JP1 is in the USER position. See “Appendix A – Configuration
Straps” on page 5-1.
3.4
3-2
Flash Uploader
The Flash Uploader included in the EB40A Boot software is the same Flash Uploader
factory-programmed in the Flash-based AT91 devices, the AT91FR4042 and the
AT91FR40162/S. The Flash Uploader allows programming to the Sector 24of Flash
through a serial port. Either of the on-chip USARTs can be used by the Flash Uploader.
To boot from the application downloaded in the Sector 24, the downloading address
must be 0x01100000. Other sectors in plane B can be used to store constant data. The
boot starts the Flash Uploader if the SW3 button is pressed at reset.
The procedure is as follows:
1. Connect the Serial A (or B (1) ) port of the AT91EB40A Evaluation Board to a host
PC Serial Port using the straight serial cable provided.
2. Start the AT91Loader.exe program available in the AT91 Library on the host com-
puter. The AT91 Loader must be configured beforehand. For more details, see
the documentation regarding the free Host Loader available for download on the
Atmel web site.
3. Check JP1 is in STD position. Power-on or press RESET, holding down the SW3
button simultaneously. Wait for all LEDs to light up together and then release
SW3. LED3 remains lit. If the AT91Loader is configured in automatic mode, the
download starts. Wait for the download to end.
AT91EB40A Evaluation Board User Guide
2635C–ATARM–13-May-05
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