参数资料
| 型号： | AT90USBKEY2 |
| 厂商： | Atmel |
| 文件页数： | 10/22页 |
| 文件大小： | 0K |
| 描述： | KIT DEMO FOR AT90USB |
| 产品培训模块： | megaAVR Introduction |
| 标准包装： | 1 |
| 主要目的： | USB 控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | AT90USB1286，AT90USB1287，AT90USB646，AT90USB647 |
| 已供物品： | 板，线缆 |
| 产品目录页面： | 611 (CN2011-ZH PDF) |
| 配用： | ATSTK525-ND - KIT STARTER FOR AT90USB |
| 相关产品： | AT90USB1287-16AUR-ND - IC MCU AVR 128K ISP USB TQFP64 AT90USB82-16MUR-ND - MCU AVR USB 8K FLASH 32-QFN AT90USB162-16MU-ND - MCU AVR USB 16K FLASH 32-QFN AT90USB162-16AU-ND - MCU AVR USB 16K FLASH 32-TQFP AT90USB162-16MURDKR-ND - IC AVR MCU 16K FLASH 32QFN AT90USB162-16AURDKR-ND - IC AVR MCU 16K FLASH 32TQFP AT90USB82-16MU-ND - IC AVR MCU 8K FLASH 32QFN AT90USB162-16MURCT-ND - IC AVR MCU 16K FLASH 32QFN AT90USB162-16AURCT-ND - IC AVR MCU 16K FLASH 32TQFP AT90USB162-16MURTR-ND - IC AVR MCU 16K FLASH 32QFN 更多... |
| 其它名称： | AT90USBKEY AT90USBKEY-ND |
Using the AT90USBKey
2.4.3
LEDs
The AT90USBKey includes 2 bi-color LEDs (green/red) implemented on one line. They
are connected to the high nibble of “Port D” of AT90USB (PORTD[4..7]).
To light on a LED, the corresponding port pin must drive a high level. To light off a LED,
the corresponding port pin must drive a low level.
Figure 2-7 . LEDs Implementation schematic
LEDs
In-line Grouped LEDs
D2
1k
R14
PD4
PD[7..0]
1k
R17
PD5
D5
1k
1k
R22
R23
PD6
PD7
Table 2-1 . Leds references
2.4.4
Temperature Sensor
LED Reference
D2
D5
AT90USB Connection
PORTD.4
PORTD.5
PORTD.6
PORTD.7
Color
Red
Green
Green
Red
The temperature sensor uses a thermistor (R29), or temperature-sensitive resistor. This
thermistor have a negative temperature coefficient (NTC), meaning the resistance goes
up as temperature goes down. Of all passive temperature measurement sensors,
thermistors have the highest sensitivity (resistance change per degree of temperature
change). Thermistors do not have a linear temperature/resistance curve.
The voltage over the NTC can be found using the A/D converter (connected to channel
0). See the AT90USB Datasheet for how to use the ADC. The thermistor value (R T ) is
calculate with the following expression:
R T = ( R H ? V ADC 0 ) ? ( V CC V ADC 0 )
2-10
7627A–AVR–04/06
Where:
R T = Thermistor value ( Ω ) at T temperature (°Kelvin)
R H = Second resistor of the bridge -100 K Ω ± 10% at 25°C
V ADC0 = Voltage value on ADC-0 input (V)
V CC = Board power supply
AT90USBKey Hardware User Guide
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相关代理商/技术参数 |
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| AT-913(40) | 功能描述:衰减器 -IC RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C |
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