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参数资料
| 型号： | AT91SAM9G20-EK |
| 厂商： | Atmel |
| 文件页数： | 35/39页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR AT91SAM9G20 MCU |
| 产品培训模块： | MCU Product Line Introduction |
| 标准包装： | 1 |
| 类型： | MCU |
| 适用于相关产品： | AT91SAM9G20 |
| 所含物品： | 板，线缆，CD，电源 |
| 相关产品： | AT91SAM9G20B-CU-ND - IC ARM9 MPU 217-LFBGA |
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Section 6
Errata
6.1
6.2
6.3
Wrong Silkscreen of BB and 1.0V on the Board
There is a silkscreen reversion on the board, for the selection of the VDDBU source:
On J10 position 1-2, the marking should be ‘BB’ for Battery Backup instead of ‘1.0V’
On J10 position 2-3, the marking should be ‘1.0V’ instead of ‘BB’.
This erratum is not applicable for AT91SAM9G20-EK Rev. C and later versions.
Choice of an Oscillator Capacitance
For many reasons at the manufacturing level, Atmel does not specify any crystal references at the board
design stage.
Because of that, the user can find an inconsistency in the value of the used capacitance of the
18.432 MHz crystal on each pin (C23, C24), and the nominal load capacitance of the crystal.
As a reminder, here is the way to select these values.The electrical parameter allows you to fit the right
values provided by the crystal manufacturer - and not by Atmel. They are called "Load Capacitance" of
the crystal. You have to take stray capacitances (package, socket, trace) into account in order to be
close enough to the equivalent nominal Load Capacitance.
With the on-board HCM49-18.432MABJT crystal reference, 10 pF capacitances have been fitted on the
18.432 MHz crystal for a nominal 27 pF load capacitance.
SD Card Slots and Booting Capability
On the board, Slot J13 is incorrectly marked with a “bootable” mention (solder side). This should be
applied to J35 instead. However, the schematic entitled ” Memory” attached to this User Guide, in Sec-
AT91SAM9G20-EK Evaluation Board User Guide
6-1
6413C–ATARM–18-Feb-09
相关PDF资料 |
PDF描述 |
|---|---|
| AT91SAM9M10-EKES | KIT EVAL FOR AT91SAM9M10 |
| AT91SAM9M10-G45-EK | KIT EVAL FOR AT91SAMG45/9M10 |
| AT91SAM9RL-EK | KIT EVAL FOR AT91SAM9RL |
| AT91SAM9X35-EK | KIT EVAL FOR AT91SAM9X35 |
| AT91SAM9XE-EK | KIT EVAL FOR AT91SAM9XE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91SAM9G25-BFU | 制造商:Atmel Corporation 功能描述:VFBGA, GREEN, IND TEMP, MRLA - Trays 制造商:Atmel Corporation 功能描述:IC MCU ARM9 64KB ROM 247VFBGA |
| AT91SAM9G25-BFU-999 | 制造商:Atmel Corporation 功能描述:VFBGA,GREEN,IND TEMP,MRLA,T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU ARM9 64KB ROM 247VFBGA |
| AT91SAM9G25-CFU | 功能描述:微处理器 - MPU TFBGA GRN IND TEMP MRLA RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| AT91SAM9G25-CFU-999 | 制造商:Atmel Corporation 功能描述:BGA,GREEN,IND TEMP,MRL A,T&R 制造商:Atmel Corporation 功能描述:BGA,GREEN,IND TEMP,MRL A,T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU ARM9 ROM 247BGA 制造商:Atmel Corporation 功能描述:BGAGREEN,IND TEMP,MRL A |
| AT91SAM9G25-CFUR | 制造商:Atmel Corporation 功能描述:BGA,GREEN,IND TEMP,MRL A,T&R - Tape and Reel 制造商:Atmel Corporation 功能描述:IC MCU ARM9 64KB ROM 247TFBGA |
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