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參數(shù)資料
| 型號： | MICRF610 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 868-870 MHz ISM Band Transceiver Module |
| 中文描述： | 868-870 MHz ISM頻帶收發(fā)模塊 |
| 文件頁數(shù)： | 7/19頁 |
| 文件大?。?/td> | 303K |
| 代理商： | MICRF610 |
Micrel, Inc.
MICRF620
December 2005
15
M9999-120205
Another application for which the RSSI could be used is to
determine if transmit power can be reduced in a system. If
the RSSI detects a strong signal, it could tell the
transmitter to reduce the transmit power to reduce current
consumption.
FEE
A6..A0
D7
D6
D5
D4
D3
D2
D1
D0
0010101
-
FEEC_3
FEEC_2
FEEC_1
FEEC_0
0010110
FEE_7
FEE_6
FEE_5
FEE_4
FEE_3
FEE_2
FEE_1
FEE_0
The Frequency Error Estimator (FEE) uses information
from the demodulator to calculate the frequency offset
between the receive frequency and the transmitter
frequency. The output of the FEE can be used to tune the
XCO frequency, both for production calibration and for
compensation for crystal temperature drift and aging.
The input to the FEE circuit are the up and down pulses
from the demodulator. Every time a ‘1’ is updated, an UP-
pulse is coming out of the demodulator and the same with
the DN-pulse every time the ‘0’ is updated. The expected
no. of pulses for every received symbol is 2 times the
modulation index ().
The FEE can operate in three different modes; counting
only UP-pulses, only DN-pulses or counting UP+DN
pulses. The no. of received symbols to be counted is either
8, 16, 32 or 64. This is set by the FEEC_0…FEEC_3
control bit, as follows:
FEEC_1
FEEC_0
FEE Mode
0
Off
0
1
Counting UP pulses
1
0
Counting DN pulses
1
Counting UP and DN pulses. UP
increments the counter, DN
decrements it.
FEEC_3
FEEC_2
No. of symbols used for the
measurement
0
8
0
1
16
1
0
32
1
65
Table 8. FEEC Control Bit
The result of the measurement is the FEE value, this can
be read from register with address 0010110b. Negative
values are stored as a binary no between 0000000 and
1111111. To calculate the negative value, a two’s
complement of this value must be performed. Only FEE
modes where DN-pulses are counted (10 and 11) will give
a negative value.
When the FEE value has been read, the frequency offset
can be calculated as follows:
Mode UP:
Foffset = R/(2P)x(FEE-Fp)
Mode DN:
Foffset = R/(2P)x(FEE+Fp)
Mode UP+DN: Foffset = R/(4P)x(FEE)
where FEE is the value stored in the FEE register, (Fp is
the single sided frequency deviation, P is the number. of
symbols/data bit counted and R is the symbol/data rate. A
positive Foffset means that the received signal has a
higher frequency than the receiver frequency. To
compensate for this, the receivers XCO frequency should
be increased.
It is recommended to use Mode UP+DN for two reasons,
you do not need to know the actual frequency deviation
and this mode gives the best accuracy.
Bit Synchronizer
A6..A0
D7
D6
D5
D4
D3
D2
D1
D0
0000110
-
‘0’
BitSync_clkS2 BitSync_clkS1 BitSync_clkS0 BitRate_clkS2
0000111 BitRate_clkS1 BitRate_clkS0 RefClk_K5 RefClk_K4
RefClk_K3
RefClk_K2
RefClk_K1
RefClk_K0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MICRF610_0608 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:868-870MHz ISM Band Transceiver Module |
| MICRF610DEV1 | 制造商:Micrel Inc 功能描述:DEVELOPMENT KIT TRANSCEIVER 868MHZ |
| MICRF610TR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:868-870 MHz ISM Band Transceiver Module |
| MICRF610Z | 功能描述:IC RF MOD 868-870MHZ 11.5X14.1MM RoHS:是 類別:RF/IF 和 RFID >> RF 收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數(shù)據(jù)傳輸率 - 最大:54Mbps 調(diào)制或協(xié)議:* 應(yīng)用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
| MICRF610Z TR | 功能描述:IC RF MOD 868-870MHZ 11.5X14.1MM RoHS:是 類別:RF/IF 和 RFID >> RF 收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數(shù)據(jù)傳輸率 - 最大:54Mbps 調(diào)制或協(xié)議:* 應(yīng)用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
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