Atmel Evaluation Kit AT91SAM9260-EK AT91SAM9260-EK 数据表
产品代码
AT91SAM9260-EK
21
SAM9260 [SUMMARY]
6221LS–ATARM–15-Oct-12
z
Downloads and runs an application from external storage media into internal SRAM
z
Downloaded code size depends on embedded SRAM size
z
Automatic detection of valid application
z
Bootloader on a non-volatile memory
z
SPI DataFlash
®
connected on NPCS0 and NPCS1 of the SPI0
z
8-bit and/or 16-bit NAND Flash
z
SAM-BA
®
Monitor in case no valid program is detected in external NVM, supporting
z
Serial communication on a DBGU
z
USB Device Port
8.1.1.2 BMS = 0, Boot on External Memory
z
Boot on slow clock (On-chip RC or 32,768 Hz)
z
Boot with the default configuration for the Static Memory Controller, byte select mode, 16-bit data bus, Read/Write
controlled by Chip Select, allows boot on 16-bit non-volatile memory.
controlled by Chip Select, allows boot on 16-bit non-volatile memory.
The customer-programmed software must perform a complete configuration.
To speed up the boot sequence when booting at 32 kHz EBI CS0 (BMS=0), the user must take the following steps:
1.
Program the PMC (main oscillator enable or bypass mode).
2.
Program and start the PLL.
3.
Reprogram the SMC setup, cycle, hold, mode timings registers for CS0 to adapt them to the new clock.
4.
Switch the main clock to the new value.
8.2
External Memories
The external memories are accessed through the External Bus Interface. Each Chip Select line has a 256-Mbyte
memory area assigned.
memory area assigned.
Refer to the memory map in
8.2.1
External Bus Interface
z
Integrates three External Memory Controllers
z
Static Memory Controller
z
SDRAM Controller
z
ECC Controller
z
Additional logic for NAND Flash
z
Full 32-bit External Data Bus
z
Up to 26-bit Address Bus (up to 64MBytes linear)
z
Up to 8 chip selects, Configurable Assignment:
z
Static Memory Controller on NCS0
z
SDRAM Controller or Static Memory Controller on NCS1
z
Static Memory Controller on NCS2
z
Static Memory Controller on NCS3, Optional NAND Flash support
z
Static Memory Controller on NCS4 - NCS5, Optional CompactFlash support
z
Static Memory Controller on NCS6-NCS7
8.2.2
Static Memory Controller
z
8-, 16- or 32-bit Data Bus
z
Multiple Access Modes supported
z
Byte Write or Byte Select Lines