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參數(shù)資料
| 型號： | TRF5001GQE |
| 英文描述： | RECEIVER|BICMOS|BGA|80PIN|PLASTIC |
| 中文描述： | 接收機| BICMOS工藝| BGA封裝| 80腳|塑料 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 258K |
| 代理商： | TRF5001GQE |
DATE AND TRACKING INFORMATION
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
operating modes
Two operating modes exist in the TRF5001 device. Normal mode (GPS receiver enabled) powers up the entire
receive chain to allow immediate processing of down-converted GPS signals. Sleep mode (also known as
blanking mode) is programmable via the 3-wire interface to allow maximum flexibility.
Sleep mode is optionally enabled during transmit bursts in Time-Division Multiple Access (TDMA) slotted
systems to mitigate potential handset-to-GPS receiver jamming. Sleep mode also reduces power consumption
in GPS applications where front-end preselect filtering has been reduced but the synthesizer must remain
locked (due to its relatively longer lock time). At power up of the device, all internal devices are disabled with
outputs set to zero until the device is programmed via the 3-wire interface.
Table 8. Operating Mode
SLEEP
OPERATING MODE
0
Sleep (blanking) mode (register data preserved)
1
Normal/GPS receiver enabled (register data preserved)
P
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