参数资料
| 型号： | ATEVK527 |
| 厂商： | Atmel |
| 文件页数： | 8/35页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL PWM AVR USB 4 SERIES |
| 标准包装： | 1 |
| 系列： | AVR® |
| 主要目的： | 电源管理，电池充电器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | ATmega16U4，ATmega32U4 |
| 主要属性： | 1 芯锂离子电池 |
| 次要属性： | 图形用户界面，USB 接口 |
| 已供物品： | 板 |
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3.3.3 Electrical pinout
This application uses a particular type of lithium-ion batteries and all configurations
presented here are based on manufacturer’s data. Other lithium-ion batteries may
naturally be used but it is up to the user to look up battery data from manufacturer’s
data sheets and make sure necessary adjustments are made to firmware and
hardware.
The figure below illustrates connection pads of the lithium-ion batteries used in this
application.
Figure 3-2. Connection pads of a VARTA? EasyPack cell.
The battery is connected to the battery charger as follows.
Table 3-3. Connecting battery to charger
Battery Connector
- (minus)
NTC
ID
+ (plus)
Charger Connector
BATTERY-
NTC/RID
SCL
BATTERY+
Note
Battery temperature measurement
RID, Battery identification resistor
3.4 VBUS Supply Voltage
USB powered applications fall into one of the three following categories:
? Low-Power Bus The low power bus powered functions derive all their power from
VBUS and must not draw more than 1 unit load (100mA) according to the USB
standard. It must also be able to work between the VBUS voltage of 4.40V and
5.25V.
? High-Power Bus The high power bus powered functions derive all their power
from VBUS and cannot draw more than 100mA until it has been configured. Once
configured, it can draw up to 5 unit loads (500mA) by requesting it in its descriptor.
At full load, it must be able to work between the VBUS voltage of 4.75V and
5.25V.
8
AVR146
7801A-AVR-06/08
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