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參數(shù)資料
| 型號： | AT91SAM9261-CJ |
| 廠商： | Atmel |
| 文件頁數(shù)： | 13/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ARM9 MPU 217BGA |
| 標(biāo)準(zhǔn)包裝： | 126 |
| 系列： | AT91SAM |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 190MHz |
| 連通性： | EBI/EMI，I²C，MMC，SPI，SSC，UART/USART，USB |
| 外圍設(shè)備： | DMA，LCD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 96 |
| 程序存儲器容量： | 32KB（32K x 8） |
| 程序存儲器類型： | ROM |
| RAM 容量： | 192K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.08 V ~ 1.32 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 217-LFBGA |
| 包裝： | 托盤 |
| 配用： | AT91SAM9261-EK-ND - KIT EVAL FOR AT91SAM926EJ-S AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9 |
| 其它名稱： | AT91SAM9261B-CJ AT91SAM9261B-CJ-ND |
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20
6062LS–ATARM–23-Mar-09
AT91SAM9261
8.1.2
Boot Strategies
The system always boots at address 0x0. To ensure a maximum number of possibilities for boot,
the memory layout can be configured with two parameters.
REMAP allows the user to lay out the first internal SRAM bank to 0x0 to ease development. This
is done by software once the system has booted for each Master of the Bus Matrix. Refer to the
Bus Matrix Section for more details.
When REMAP = 0, BMS allows the user to lay out to 0x0, at his convenience, the ROM or an
external memory. This is done via hardware at reset.
Note:
Memory blocks not affected by these parameters can always be seen at their specified base
addresses. See the complete memory map presented in Figure 8-1 on page 16.
The AT91SAM9261 Bus Matrix manages a boot memory that depends on the level on the BMS
pin at reset. The internal memory area mapped between address 0x0 and 0x000F FFFF is
reserved for this purpose.
If BMS is detected at 1, the boot memory is the embedded ROM.
If BMS is detected at 0, the boot memory is the memory connected on the Chip Select 0 of the
External Bus Interface.
8.1.2.1
BMS = 1, Boot on Embedded ROM
The system boots using the Boot Program.
Downloads and runs an application from external storage media into internal SRAM
Downloaded code size depends on embedded SRAM size
Automatic detection of valid application
Bootloader on a non-volatile memory
–SDCard
–NAND Flash
– SPI DataFlash connected on NPCS0 of the SPI
SAM-BA boot in case no valid program is detected in external NVM, supporting:
– Serial communication on a DBGU
– USB Device HS Port
8.1.2.2
BMS = 0, Boot on External Memory
Boot on slow clock (32,768 Hz)
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.
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT91SAM9261-CJ-999 | 功能描述:ARM微控制器 - MCU BGA Ind. Temp RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| AT91SAM9261-EK | 功能描述:開發(fā)板和工具包 - ARM Supports AT91SAM9261 ARM926EJS dev & eval RoHS:否 制造商:Arduino 產(chǎn)品:Development Boards 工具用于評估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口類型:DAC, ICSP, JTAG, UART, USB 工作電源電壓:3.3 V |
| AT91SAM9261S | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb-based Microcontrollers |
| AT91SAM9261S_09 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AT91 ARM Thumb-based Microcontrollers |
| AT91SAM9261SB-CU | 功能描述:ARM微控制器 - MCU 32-bit RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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