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參數(shù)資料
| 型號： | MRF24J40 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | IEEE 802.15.4⑩ 2.4 GHz RF Transceiver |
| 中文描述： | IEEE 802.15.4標(biāo)準(zhǔn)⑩2.4 GHz射頻收發(fā)器 |
| 文件頁數(shù)： | 10/66頁 |
| 文件大?。?/td> | 748K |
| 代理商： | MRF24J40 |
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MRF24J40
DS39776A-page 8
Advance Information
2006 Microchip Technology Inc.
To create a clean clock signal, the CLKOUT pin is held
low for a period when power is first applied. After the
Power-on Reset ends, the Oscillator Start-up Timer
(OST) will begin counting. When the OST expires, the
CLKOUT pin will begin outputting its default frequency
of 2.5 MHz (main clock divided by 8).
2.4
RF Output
RFP and RFN are the differential RF input/output pins.
These pins are connected to the antenna of the system,
as seen in the example circuit diagram in Figure A-1. L5
is an RF choke. This inductor filters out non 2.4 GHz
voltages. L3, L4, C37 and C43 act as a balun. The balun
converts a differential unbalanced input and converts it
to a balanced singled-ended output and visa versa. L1,
C23 and C38 form a pi-type matching circuit to match
the impedance of the balun to the impedance of the
antenna. This circuit is not required if the impedance of
the balun matches the antenna impedance. Refer
to
Appendix A.1 “Layout Considerations and RF
Measurements”
for more details about board layout
and part selection concerning the RF output pins.
REGISTER 2-2:
RFCTRL7: RF CONTROL REGISTER 7
R/W-0
R/W-0
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
R/W-0
SLPCLK<7:6>
CLKDIV<1:0>
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-6
SLPCLK7:SLPCLK6:
Sleep Clock Selection bits
00
= None
01
= External crystal
10
= Internal ring oscillator
11
= Reserved
Unimplemented:
Read as ‘
0
’
CLKDIV1:CLKDIV0:
MRF24J40 Clock Output Frequency bits
00
= 2.5 MHz
01
= 5 MHz
10
= 10 MHz
11
= 20 MHz
bit 5-2
bit 1-0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MRF24J40_08 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:IEEE 802.15.4? 2.4 GHz RF Transceiver |
| MRF24J40_10 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:IEEE 802.15.4a?￠ 2.4 GHz RF Transceiver |
| MRF24J40-I | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:IEEE 802.15.4⑩ 2.4 GHz RF Transceiver |
| MRF24J40-I/ML | 功能描述:射頻收發(fā)器 2.4 Ghz IEEE/ZigBee RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| MRF24J40-I/ML | 制造商:Microchip Technology Inc 功能描述:ZIGBEE Transceiver IC |
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