- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄55 > MICRF405YML TR (Micrel Inc)TRANSMITTER ASK/FSK 24-MLF Datasheet資料下載
參數(shù)資料
| 型號： | MICRF405YML TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 16/46頁 |
| 文件大?。?/td> | 649K |
| 描述： | TRANSMITTER ASK/FSK 24-MLF |
| 標準包裝： | 1 |
| 頻率： | 290MHz ~ 980MHz |
| 應(yīng)用： | ISM |
| 調(diào)制或協(xié)議： | ASK，F(xiàn)SK |
| 數(shù)據(jù)傳輸率 - 最大： | 200 kbps |
| 功率 - 輸出： | 10dBm |
| 電流 - 傳輸： | 18mA |
| 數(shù)據(jù)接口： | PCB，表面貼裝 |
| 天線連接器： | PCB，表面貼裝 |
| 電源電壓： | 2.2 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，24-MLF? |
| 包裝： | 標準包裝 |
| 產(chǎn)品目錄頁面： | 571 (CN2011-ZH PDF) |
| 其它名稱： | 576-1965-6 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁
Micrel
MICRF405
April 2006
16
M9999-041906
(408) 955-1690
The sequence of a typically packet transfer is shown
in Figure 7.
1. Set the 405 in transmit mode with the correct
settings by writing in the TX control word.
Once SEN is pulled high, the internal load will
activate the new settings. The 405 will now
start the PLL and turn on the PA (if
PA_LDc_en is set)
2. Pull SEN low, and address the TX buffer.
Address=29+R/W, RW= 0 .
3. Write the frame length into the data buffer. On
the 8
th
falling edge of SCK, clocking in the last
bit, the modulation will start. If MOD_LDc_en is
not set, check that lock detect (LD) is high after
PA is turned on before writing last bit (or the
complete byte 3). If MOD_LDc_en=1, finish
steps 2 and 3 immediately after step 1. The
MICRF405 will now wait until the transmitter is
ready (PLL tuned in, PA on and LD high)
before starting to modulate. In either case, the
packet engine will start to transmit the desired
preamble and SyncID bytes once the
modulation starts.
4. When the last bit of the last SyncID byte is
being sent, the RDY signal is high. After the
falling edge of RDY, the packet engine is
sending the frame length, and the buffer is
then ready for refill. The time between 3 and 4
will vary depending, upon the bit rate and
desired number of bytes in the preamble and
SyncID field. The first RDY pulse will, however,
notify the user when to enter the 1
st
byte of the
payload. Step four is repeated for all the bytes
in the payload, meaning [frame length
number of CRC bytes] times. It is important
that the buffer is refilled after the falling edge of
RDY and before the next falling edge of RDY.
5. In this step, all user data is received in the 405
and it transmits the last part of the packet. This
means that the SEN now can be pulled high at
any time, closing the write session. If
PA_LDc_en=1 and load_en=1, it is then
necessary to leave SEN low until the end of
packet. This is because raising SEN will
generate a load pulse, and this, in turn, causes
the PA_LDc function to turn off the PA for a
short period of time. The RDY signal will be
high when the last bit of the payload is being
sent, but there is now no need to refill the
buffer. Also, if CRC is enabled, then RDY will
be high during the last bit of each of the CRC
bytes being sent. Because of an internal
sampling the actual RF output lags 1 bit
period, which means the modulation will stop
one bit period after the last RDY pulse.
6. The frame is now completely transmitted. If
PA_FEc_en=1, the PA will be automatically
turned off immediately after last bit in packet is
transmitted. The PLL will, however, remain
running. (This state is equal to MODE[1:0]=3
(TX), PA_LDc_en=0 and PA[2:0]=0.) If
PA_FEc_en=0 the PA will remain on until it is
turned off by the MODE or PA bits. In step 6,
the buffer is ready for a new packet. Any 8bits
entered into the buffer in this sections is
though of as a new frame length, refer back to
Section 3. This, assuming the MICRF405
remains in TX (MODE[1:0]=3). In this case,
and when PA_FEc_en=1, the PA will be turned
on once the 8
th
bit is clocked in. It is
recommended to use the MOD_LDc function in
this case as it will delay the modulation until
the PLL has stabilized after the PA is turned
on. If not the start of the modulation will be
distorted and may interfere the settling of the
PLL due to PA turn on (please see chapter
Lock Detect).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MTX-102-433DR-B | MODULE TRANSMITTER 433MHZ 18DIP |
| MTX-103-915DR-B | MODULE TRANSMITTER 915MHZ 18DIP |
| MTX-405-433DR-B | MODULE TRANSMITTER 433MHZ 24DIP |
| N50P105 | IC MODULE MINI JOYSTICK SMD |
| OCB350L187Z | BOARD CALIBR CIRCUIT OPB350L187 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MICRF500 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:700MHz to 1.1GHz RadioWire RF Transceiver |
| MICRF500BLQ | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:700MHz to 1.1GHz RadioWire RF Transceiver |
| MICRF500BLQ TR | 功能描述:射頻接收器 700-1000MHz, 3.0V, FSK, FH Transceiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MICRF500BLQTR | 功能描述:TXRX UHF 700-1100MHZ 44-LQFP RoHS:否 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 標準包裝: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 |
| MICRF500EVAL1 | 功能描述:射頻開發(fā)工具 MICRF500 Evaluation Kit - For experimental use only RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。