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参数资料
| 型号： | JMBADGE2008-B |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 6/18页 |
| 文件大小： | 0K |
| 描述： | BOARD JM BADGE |
| 标准包装： | 1 |
| 系列： | ColdFire®, Flexis™ |
| 类型： | MCU |
| 适用于相关产品： | MCF51JM128 |
| 所含物品： | 板，线缆，DVD 和指南 |
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3.2.1 Li - Ion ? Battery ?
The ? JM ? Badge ? Board ? is ? equipped ? with ? a ? rechargeable ? Lithium ‐ ion ? battery, ? LIR2430. ?? The ? typical ?
specifications ? for ? the ? battery ? are ? shown ? in ? Table ? 2 ? below. ?? The ? typical ? charge ? and ? discharge ? voltage ?
vs. ? capacity ? graph ? is ? shown ? in ? below. ?
Table ? 2. Typical ? LIR2430 ? Battery ? Specifications ?
Specification ?
Capacity ?
Nominal ? Voltage ?
Max. ? Discharge ? Current ?
Max. ? Charge ? Current ?
Value ?
65mAh ?
3.7V ?
110mA ?
55mA ?
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Figure ? 2. LIR2430 ? Voltage ? vs. ? Capacity ?
The ? ON/OFF ? switch, ? SW1 , ? can ? be ? used ? to ? isolate ? the ? battery ? from ? all ? circuitry ? except ? the ? MC34673 ?
charger. ?? While ? in ? the ? OFF ? position, ? the ? JM ? Badge ? Board ? will ? not ? be ? able ? to ? run ? from ? the ? battery, ?
but ? the ? board ? can ? still ? be ? powered ? from ? the ? USB ? interface. ??
3.2.2 USB ? VBUS ?
A ? hardware ‐ triggered ? switch ? (MOSFET ? transistor ? and ? isolation ? diode) ? will ? automatically ? switch ? the ?
system ? power ? source ? from ? the ? battery ? to ? the ? USB ? when ? power ? is ? applied ? to ? the ? VBUS ? pin ? on ? the ?
USB ? mini ‐ AB ? connector. ?? The ? MC34673 ? charger ? IC ? monitors ? the ? USB ? VBUS ? supply. ?? Once ? power ? is ?
detected ? on ? this ? line, ? the ? /PPR ? signal ? is ? asserted ? informing ? the ? MCF51JM ? MCU ? that ? a ? USB ? power ?
source ? is ? present. ?? The ? MCF51JM ? can ? then ? enable ? the ? battery ? charger ? and ? monitor ? the ? charging ?
status. ??
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JM ? Badge ? Board ? User’s ? Manual ?
Page ? 6 ? of ? 18 ?
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