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| 型号： | AT91SAM7X-EK |
| 厂商： | Atmel |
| 文件页数： | 15/44页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR AT91SAM7X256/128 |
| 产品培训模块： | AT91SAM7X and SAM7XC Flash-based Microcontrollers MCU Product Line Introduction |
| 标准包装： | 1 |
| 系列： | AT91SAM 智能 ARM |
| 类型： | MCU |
| 适用于相关产品： | AT91SAM7X256，AT91SAM7X128 |
| 所含物品： | 板，线缆，DVD，电源 |
| 相关产品： | AT91SAM7X256-CU-999-ND - IC MCU ARM7 256KB FLASH 100TFBGA AT91SAM7X128-CU-999-ND - IC MCU ARM7 128KB FLASH 100TFBGA AT91SAM7X128-AU-999-ND - IC MCU ARM7 128KB FLASH 100LQFP AT91SAM7X512-CU-ND - MCU ARM 512K HS FLASH 100-TFBGA AT91SAM7X512-AU-ND - MCU ARM 512K HS FLASH 100-LQFP AT91SAM7X256-CU-ND - MCU ARM 256K HS FLASH 100-TFBGA AT91SAM7X128-CU-ND - MCU ARM 128K HS FLASH 100-TFBGA AT91SAM7X256-AU-999TR-ND - IC ARM7 MCU 256K FLASH 100-LQFP AT91SAM7X256-AU-ND - IC ARM7 MCU FLASH 256K 100LQFP AT91SAM7X128-AU-ND - IC ARM7 MCU FLASH 128K 100LQFP |
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6120GS–ATARM–07-Apr-11
SAM7X512/256/128 Summary
after a full flash erase is performed. When the security bit is deactivated, all accesses to the
flash are permitted.
It is important to note that the assertion of the ERASE pin should always be longer than 220 ms.
As the ERASE pin integrates a permanent pull-down, it can be left unconnected during normal
operation. However, it is safer to connect it directly to GND for the final application.
8.5.5
Non-volatile Brownout Detector Control
Two general purpose NVM (GPNVM) bits are used for controlling the brownout detector (BOD),
so that even after a power loss, the brownout detector operations remain in their state.
These two GPNVM bits can be cleared or set respectively through the commands “Clear Gen-
eral-purpose NVM Bit” and “Set General-purpose NVM Bit” of the EFC User Interface.
GPNVM Bit 0 is used as a brownout detector enable bit. Setting the GPNVM Bit 0 enables
the BOD, clearing it disables the BOD. Asserting ERASE clears the GPNVM Bit 0 and thus
disables the brownout detector by default.
The GPNVM Bit 1 is used as a brownout reset enable signal for the reset controller. Setting
the GPNVM Bit 1 enables the brownout reset when a brownout is detected, Clearing the
GPNVM Bit 1 disables the brownout reset. Asserting ERASE disables the brownout reset by
default.
8.5.6
Calibration Bits
Eight NVM bits are used to calibrate the brownout detector and the voltage regulator. These bits
are factory configured and cannot be changed by the user. The ERASE pin has no effect on the
calibration bits.
8.6
Fast Flash Programming Interface
The Fast Flash Programming Interface allows programming the device through either a serial
JTAG interface or through a multiplexed fully-handshaked parallel port. It allows gang-program-
ming with market-standard industrial programmers.
The FFPI supports read, page program, page erase, full erase, lock, unlock and protect
commands.
The Fast Flash Programming Interface is enabled and the Fast Programming Mode is entered
when the TST pin and the PA0 and PA1 pins are all tied high.
8.7
SAM-BA Boot Assistant
The SAM-BA Boot Assistant is a default Boot Program that provides an easy way to program in-
situ the on-chip Flash memory.
The SAM-BA Boot Assistant supports serial communication via the DBGU or the USB Device
Port.
Communication via the DBGU supports a wide range of crystals from 3 to 20 MHz via
software auto-detection.
Communication via the USB Device Port is limited to an 18.432 MHz crystal.
The SAM-BA Boot provides an interface with SAM-BA Graphic User Interface (GUI).
The SAM-BA Boot is in ROM and is mapped at address 0x0 when the GPNVM Bit 2 is set to 0.
When GPNVM bit 2 is set to 1, the device boots from the Flash.
When GPNVM bit 2 is set to 0, the device boots from ROM (SAM-BA).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91SAM9260 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91SAM9260_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Thumb Microcontrollers |
| AT91SAM9260_08 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91SAM9260_09 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91SAM9260B-CFU | 功能描述:ARM微控制器 - MCU 32-bit 0.5mm pitch 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 |
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