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參數(shù)資料
| 型號： | PRISM1RC |
| 廠商： | Intersil Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 112K |
| 代理商： | PRISM1RC |
4-382
Functional Overview
The Radio Card is based on the Intersil PRISM Direct
Sequence Chip Set.
There are ten basic units in this card:
1. Baseband Processor
2. Modulator/Demodulator
3. Dual Synthesizer
4. Up/Down Converter
5. Power Amplifier
During transmission, the data to be transmitted should be
placed on the TX data line going into the baseband processor.
This data will be modulated according to the format selected
(DBPSK or DQPSK) and then spread using a programmable
PN code. Two signals will be generated (I & Q).
6. Low Noise Amplifier (LNA)
7. RF VCO
8. IF VCO
9. Antenna
10. Buffer Interface
TheI&QsignalsaresenttotheModulator/Demodulatorwhere
they will be first filtered and then modulated with the IF
frequency (280MHz). The IF oscillator generates 560MHz
which is divided by two inside the Modulator/Demodulator, so
the final IF signal is 280MHz. Next, the two signals are
combined into a single signal and sent over to the Up/Down
converter.
The Up/Down converter will shift this signal to the RF
channel programmed in the synthesizer, in the 2.4GHz ISM
band.
In the final stage this signal is amplified to produce a power
output of 15dBm minimum measured at the antenna.
In the receive mode, the radio signal is received by the
antenna, amplified by the LNA, and placed into the Up/Down
converter. The Up/Down converter will down-convert this
signal from the 2.4GHz range to the IF frequency (280MHz).
The Modulator/Demodulator then splits the signal into the
I & Q form, before it is sent to the baseband processor.
Finally, the baseband processor despreads and
demodulates the data from DBPSK or DQPSK form, and
places it on the RX data line.
The buffer translator is used to interface between 5V and
3.5V logic.
The RF and IF Local Oscillator signals are generated using
the synthesizer and the voltage controlled oscillators. The
dual synthesizer should be programmed with the desired RF
channel frequency less the IF frequency.
Example:
RF
IF
CH1
2412MHz - 280MHz = 2132MHz
The baseband processor and the synthesizer are driven by
two 22MHz oscillators to control the timing of these chips.
Refer to Application Note AN9624 [1] for a more detailed
radio description.
Edge Connector Pin Descriptions
The block diagram in Figure 1 shows control signal
connections from the edge connector to the radio integrated
circuits.
PA_PE (I) Pin 25
When active high the baseband processor and power
amplifier are in transmit mode, otherwise they are in standby
mode (see Figure 6).
This signal is usually obtained from a MAC or a network
processor.
The internal transmit state machine will be activated by the
rising edge of PA_PE, the falling edge will deactivate it. The
PA_PE envelops the transmit data.
This signal switches the power amplifier (PA) from TX to RX
as follows:
PA_PE = high--> TX mode
PA_PE = low --> RX mode
LO
FIGURE 1. CONTROL SIGNAL CONNECTIONS
TX_PE
TXD
TXCLK
TX_RDY
CCA
RESET
RXD
RXCLK
MD_RDY
RX_PE
CS
AS
R/W
SCLK
SD
2
3
4
5
32
28
35
36
34
33
9
23
8
24
25
BASEBAND
PROCESSOR
HFA3824A
PA_PE
TX_DATA
TXC
TX_RDY
CCA
RESET_BB
RADIO_PE
RXDATA
RXCIN
MD_RDY
RX_PE_BB
BB_CS
BB_AS
BB_RD/WR
CLK/SYNTH_CLK
SD/SYNTH_DATA
CLOCK
DATA
LE
11
12
13
SYNTHESIZER
HFA3524A
SYNTH_LE
LPF_SEL0
LPF_SEL1
LPF_TX_PE
MOD_TX_PE
LPF_RX_PE
MOD_RX_PE
LIM2_PE
LIM1_PE
17
16
22
41
21
43
54
74
MOD/DEMOD
HFA3724A
SEL0
SEL1
TX_PE
RX_PE
TX_PE
RX_PE
15
28
UP/DOWN CONVERTER
HFA3624
HFA3925
POWER AMP
Application Note 9808
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PRISM24GHZCHIPSET | Direct Sequence Spread Spectrum Wireless Transceiver Chip Set |
| PRME15002 | DIP 14 SERIES REED RELAYS |
| PRMA10037 | DIP 14 SERIES REED RELAYS |
| PRMA10038 | DIP 14 SERIES REED RELAYS |
| PRMA10039 | DIP 14 SERIES REED RELAYS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PRISM24GHZCHIPSET | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Wireless Transceiver Chip Set |
| PRISM-CHIP-SET | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| PRIXP420BB | 功能描述:IC NETWRK PROCESSR 266MHZ 492BGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:- 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤 |
| PRIXP420BC | 功能描述:IC NETWRK PROCESSR 400MHZ 492BGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:- 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤 |
| PRIXP420BD | 功能描述:IC NETWRK PROCESSR 533MHZ 492BGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:- 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤 |
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