收藏本站
Circuit Description
4.3
4.4
4.5
4-2
Memories
Analog-to-digital
Converter
Power and
Crystal Quartz
The schematic (see Figure 6-3 on page 6-4 in Section 6, “Appendix B – Schematics”)
shows one AT49BV162A 2M bytes 16-bit Flash, one AT45DB321 4M bytes serial
DataFlash, one AT24C512 64K bytes EEPROM, one AT25256 32K Bytes EEPROM
and two 128K/512K x 8 SRAM devices.
Note:
The AT24C512 64K byte EEPROM and the AT25256 32K byte EEPROM are
not mounted.
An on-board 4-channel, 10-bit ADC device (TLV1504 by Texas Instruments) is featured
on the AT91EB42. This device is interfaced to the AT91M42800A via the SPIA periph-
eral and embeds its voltage reference equal to 2V. Four channels are used on the
AT91EB42 for the following measurements:
! Channel 0 is used to measure the temperature near the 32.768 kHz crystal.
! Channel 1 is dedicated to supervise the External Power Supply.
! Channel 2 is dedicated to supervise the Battery Power Supply.
! Channel 3 is dedicated to supervise the V DDCORE .
Each ADC channel is fitted on the I/O extension connector and can be used in other
applications. For this reason, each ADC input can be taken away from its function by its
appropriate jumper.
The AT91M42800A master clock is derived from a 32.768 kHz crystal. The on-chip low-
power oscillator together with two PLL-based frequency multipliers and the prescaler
results in a programmable master clock between 500 Hz and 33 MHz. A temperature
sensor has been placed near the 32.768 kHz crystal and the analog signal output has
been fitted to Channel 0 of the on-board ADC.
Two sets of components for the PLL filters are fitted by default on the board (see Figure
6-6 on page 6-7 in Section 6, “Appendix B – Schematics”). They are calculated to pro-
vide a 16.77 MHz (PLLA: multiplier factor of 512 and settling time of 600 μs) or a 32.768
MHz (PLLB: multiplier factor of 1000 and settling time of 6 ms) master clock frequency.
For further details, see the application note “Crystal Oscillator and PLL Considerations
for AT91M42800A and AT91M55800A”, literature number 1740A. A PLL Filter Calcula-
tor Tool is also available. See “Automatic_calculation_xls.zip”.
The voltage regulator provides 3.3V to the board and will light the red POWER LED
(D11) when operating.
Power can be applied via the 2.1 mm connector to the regulator in either polarity
because of the diode-rectifying circuit. Another regulator allows the user to power the
AT91M42800A core with 3.3V or 1.8V by means of the JP8 jumper.
All functions can be supplied by the on-board battery. A connector permits the user to
disconnect the battery. The type of battery and connection to be used are shown in Sec-
tion 6 of this user guide. This type of battery will ensure the power supply of the board
for approximately one hour. A battery fast-charge controller is provided on-board to
charge it and maintains the full charge. The user is warned while the fast-charge is
started via the on-board indicator (D28) or a logical signal on I/O port PB18.
AT91EB42 Evaluation Board User Guide
1708C–ATARM–12-May-05
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
AT91EB55 KIT EVAL FOR ARM AT91M55800A
AT91SAM-ICE EMULATOR FOR AT91 ARM7/ARM9
AT91SAM7A3-EK KIT EVAL FOR AT91SAM7A3
AT91SAM7L-STK KIT EVAL FOR AT91SAM7L
AT91SAM7S-EK KIT EVAL FOR ARM AT91SAM7S
AT91SAM7SE-EK EVAL BOARD FOR AT91SAM7SE
AT91SAM9261-EK KIT EVAL FOR AT91SAM926EJ-S
AT91SAM9263-EK KIT EVAL FOR AT91SAM9263
相关代理商/技术参数
AT91EB55 功能描述:开发板和工具包 - ARM EVAL KIT 55-SERIES RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V
AT91EB63 功能描述:ARM M63200 & M43300 EVAL KIT RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:AT91SAM 智能 ARM 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035
AT91F40416-25CC 功能描述:IC MCU 32BIT 2MB FLASH 120BGA 制造商:microchip technology 系列:AT91SAM 包装:托盘 零件状态:停產 核心处理器:ARM7? 核心尺寸:16/32-位 速度:25MHz 连接性:- 外设:- I/O 数:32 程序存储容量:2MB（1M x 16） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:4K x 8 电压 - 电源（Vcc/Vdd）:- 数据转换器:- 振荡器类型:外部 工作温度:0°C ~ 70°C 封装/外壳:120-LBGA 供应商器件封装:120-BGA（17x11） 基本零件编号:AT91F40416 标准包装:128
AT91F40416-25CI 功能描述:IC MCU 32BIT 2MB FLASH 120BGA 制造商:microchip technology 系列:AT91SAM 包装:托盘 零件状态:停產 核心处理器:ARM7? 核心尺寸:16/32-位 速度:25MHz 连接性:- 外设:- I/O 数:32 程序存储容量:2MB（1M x 16） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:4K x 8 电压 - 电源（Vcc/Vdd）:- 数据转换器:- 振荡器类型:外部 工作温度:-40°C ~ 85°C 封装/外壳:120-LBGA 供应商器件封装:120-BGA（17x11） 基本零件编号:AT91F40416 标准包装:128
AT91F40816 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers
AT91F40816_02 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers
AT91F40816-33CI 功能描述:ARM微控制器 - MCU 2M Flash 33M 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
AT91FR40161 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers