AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 65

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

11.4.3.3
11.4.3.4
11.4.4
6438F–ATARM–21-Jun-10
Supported DataFlash Devices
Supported Serial Flash Devices
Supported TWI EEPROM Devices
Hardware and Software Constraints
SPI Flash Boot
TWI EEPROM Boot
Two kinds of SPI Flash are supported, SPI Serial Flash and SPI DataFlash.
The SPI Flash bootloader tries to boot on SPI0 Chip Select 0, first looking for SPI Serial flash,
and then for SPI DataFlash.
It uses only one valid code detection: analysis of ARM exception vectors.
The SPI Flash read is done thanks to a Continuous Read command from address 0x0. This
command is 0xE8 for DataFlash and 0x0B for Serial Flash devices.
The SPI Flash Boot program supports all Atmel DataFlash devices.
Table 11-2.
The SPI Flash Boot program supports all Serial Flash devices.
The TWI EEPROM Bootloader uses the TWI0. It uses only one valid code detection. It analyzes
the ARM exception vectors.
TWI EEPROM Boot supports all I
address 0x50.
The NVM drivers use several PIOs in peripheral mode to communicate with devices. Care must
be taken when these PIOs are used by the application. The devices connected could be unin-
tentionally driven at boot time, and electrical conflicts between output pins used by the NVM
drivers and the connected devices may occur.
To assure correct functionality, it is recommended to plug in critical devices to other pins not
used by NVM.
Table 11-3
are driven during the boot sequence for a period of less than 1 second if no correct boot program
is found.
Device
AT45DB011
AT45DB021
AT45DB041
AT45DB081
AT45DB161
AT45DB321
AT45DB642
contains a list of pins that are driven during the boot program execution. These pins
DataFlash Device
16 Mbits
32 Mbits
64 Mbits
Density
2 Mbits
4 Mbits
8 Mbits
1 Mbit
2
C-compatible TWI EEPROM memories using 7 bits device
Page Size (bytes)
1056
264
264
264
264
528
528
AT91SAM9G45
Number of Pages
1024
2048
4096
4096
8192
8192
512
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