参数资料
| 型号： | AT91FR40162SB-CU-999 |
| 厂商： | Atmel |
| 文件页数： | 4/22页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32BIT RISC 121BGA |
| 标准包装： | 1,000 |
| 系列： | AT91 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 75MHz |
| 连通性： | EBI/EMI，UART/USART |
| 外围设备： | WDT |
| 输入/输出数： | 32 |
| 程序存储器容量： | 2MB（1M x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 256K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 121-BGA |
| 包装： | 带卷 (TR) |
12
6410BS–ATARM–12-Jan-10
AT91FR40162SB
7.6
Memory Controller
The ARM7TDMI processor address space is 4G bytes. The memory controller decodes the
internal 32-bit address bus and defines three address spaces:
Internal memories in the four lowest megabytes
Middle space reserved for the external devices (memory or peripherals) controlled by the EBI
Internal peripherals in the four highest megabytes
In any of these address spaces, the ARM7TDMI operates in little-endian mode only.
7.6.1
Internal Memories
The AT91FR40162SB microcontroller integrates 256K bytes of internal SRAM. It is 32 bits wide
and single-clock cycle accessible. Byte (8-bit), half-word (16-bit) and word (32-bit) accesses are
supported and are executed within one cycle. Fetching either Thumb or ARM instructions is sup-
ported, and internal memory can store two times as many Thumb instructions as ARM
instructions.
The SRAM is mapped at address 0x0 (after the Remap command), allowing ARM7TDMI excep-
tion vectors between 0x0 and 0x20 to be modified by the software.
Placing the SRAM on-chip and using the 32-bit data bus bandwidth maximizes the microcon-
troller performance and minimizes system power consumption. The 32-bit bus increases the
effectiveness of the use of the ARM instruction set and the processing of data that is wider than
16 bits, thus making optimal use of the ARM7TDMI advanced performance.
Being able to dynamically update application software in the 256-Kbyte SRAM adds an extra
dimension to the AT91FR40162SB.
The AT91FR40162SB also integrates a 2-Mbyte Flash memory that is accessed via the External
Bus Interface. All data, address and control lines, except for the Chip Select signal, are con-
nected within the device.
7.6.2
Boot Mode Select
The ARM reset vector is at address 0x0. After the NRST line is released, the ARM7TDMI exe-
cutes the instruction stored at this address. This means that this address must be mapped in
nonvolatile memory after the reset. The input level on the BMS pin during the last 10 clock
cycles before the rising edge of the NRST selects the type of boot memory (see Table 4-1 on
page 5).
If the embedded Flash memory is to be used as boot memory, the BMS input must be pulled
down externally and NCS0 must be connected to NCSF externally.
The pin BMS is multiplexed with the I/O line P24 that can be programmed after reset like any
standard PIO line.
7.6.3
Remap Command
The ARM vectors (Reset, Abort, Data Abort, Prefetch Abort, Undefined Instruction, Interrupt,
Fast Interrupt) are mapped from address 0x0 to address 0x20. In order to allow these vectors to
Table 7-1.
Boot Mode Select
BMS
Boot Memory
1
External 8-bit memory on NCS0
0
Internal or External 16-bit memory on NCS0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91FR40162SBPRE | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Flash memory in a single compact 121-ball BGA package |
| AT91FR40162S-CJ | 功能描述:ARM微控制器 - MCU 256K SRAM 2M FLASH IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| AT91FR40162S-CJ SL383 | 制造商:Atmel Corporation 功能描述:MCU 32-bit 91F ARM7TDMI RISC 2048KB Flash 1.8V 121-Pin BGA T/R |
| AT91FR4042 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91FR4042_02 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
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