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參數(shù)資料
| 型號： | HFA3861AIN |
| 廠商： | INTERSIL CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 288 MACROCELL 3.3 VOLT ISP CPLD |
| 中文描述： | TELECOM, CELLULAR, BASEBAND CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, PLASTIC, MS-026ACD, TQFP-64 |
| 文件頁數(shù)： | 9/37頁 |
| 文件大?。?/td> | 440K |
| 代理商： | HFA3861AIN |
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9
For the 1 and 2Mbps modes, the transmitter accepts data
from the external source, scrambles it, differentially encodes
it as either DBPSK or DQPSK, and spreads it with the BPSK
PN sequence. The baseband digital signals are then output
to the external IF modulator.
For the CCK modes, the transmitter inputs the data and
partitions it into nibbles (4 bits) or bytes (8 bits). At 5.5Mbps,
it uses two of those bits to select one of 4 complex spread
sequences from a table of CCK sequences and then QPSK
modulates that symbol with the remaining 2 bits. Thus, there
are 4 possible spread sequences to send at four possible
STANDBY
Inactive
Inactive
Inactive
1.5mA
Both transmit and receive operations disabled. Device will resume its operational
state within 1
μ
s of RX_PE or TX_PE going active.
TX
Inactive
Active
Inactive
15mA
Receiver operations disabled. Receiver will return in its operational state within 1
μ
s
of RX_PE going active.
RX
Active
Inactive
Inactive
50mA
Transmitter operations disabled. Transmitter will return to its operational state within
2 MCLKs of TX_PE going active.
NO CLOCK
I
CC
Standby
Active
300
μ
A
All inputs at V
CC
or GND.
TABLE 3. BIT RATE TABLE EXAMPLES FOR MCLK = 44MHz
DATA
MODULATION
A/D SAMPLE CLOCK
(MHz)
TX SETUP CR 5
BITS 1, 0
RX SIGNAL CR 63
BITS 7, 6
DATA RATE (Mbps)
SYMBOL RATE
(MSPS)
DBPSK
22
00
00
1
1
DQPSK
22
01
01
2
1
CCK
22
10
10
5.5
1.375
CCK
22
11
11
11
1.375
TABLE 2. POWER DOWN MODES
MODE
RX_PE
TX_PE
RESET
AT
44MHz
DEVICE STATE
802.11 DSSS BPSK
1Mbps
BARKER
802.11 DSSS QPSK
2Mbps
BARKER
DATA
I
OUT
Q
OUT
CHIP
RATE
1 BIT ENCODED TO
ONE OF 2 CODE
WORDS
(TRUE-INVERSE)
2 BITS ENCODED
TO ONE OF
4 CODE WORDS
SYMBOL
RATE
I vs Q
11 MC/S
11 MC/S
1 MS/S
1 MS/S
11 CHIPS
11 CHIPS
FIGURE 7. MODULATION MODES
5.5Mbps CCK
COMPLEX
SPREAD FUNCTIONS
4 BITS ENCODED
TO ONE OF 16
COMPLEX CCK
CODE WORDS
11 MC/S
1.375 MS/S
8 CHIPS
11Mbps CCK
COMPLEX
SPREAD FUNCTIONS
8 BITS ENCODED
TO ONE OF 256
COMPLEX CCK
CODE WORDS
11 MC/S
1.375 MS/S
8 CHIPS
HFA3861A
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HFA3861AIN96 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processo |
| HFA3861B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor |
| HFA3861BIN | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor |
| HFA3861BIN96 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor |
| HFA3861IV | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Direct Sequence Spread Spectrum Baseband Processor |
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