HFA3860 Datasheet, PDF(23/40 Page) Intersil Corporation – 11 Mbps Direct Sequence Spread Spectrum Baseband Processor

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HFA3860 Datasheet, PDF (23/40 Pages) Intersil Corporation – 11 Mbps Direct Sequence Spread Spectrum Baseband Processor

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HFA3860

VDD (ANALOG)

(10, 18, 20)

GND (ANALOG)

(11, 15, 19)

VDD (DIGITAL)

(7, 21, 29, 42)

GND (DIGITAL)

(6, 22, 31, 41)

IIN (12)

QIN (13)

REF

1.75V

(MAX)

0.25V

(MIN)

VREFP (16)

VREFN (17)

RSSI (14)

ANTSEL (26)

ANTSEL (27)

VR3+

3-BIT

A/D

3-BIT

A/D

VR3-

A/D REF

AND

LEVEL ADJ.

DE-SPREADER/ACQUISITION

MF CORRELATOR

11 -BIT BARKER

MF CORRELATOR

11 BIT BARKER

MAG. /

PHASE

AND

TIMING

DISTRIB.

BIT

SYNC

RSSI

REF

6-BIT

A/D

ANALOG

PHASE

ROTATE

PSK

DEMOD

DIFF

DECODER

CLEAR CHANNEL

ASSESSMENT/

SIGNAL QUALITY

NCO

PHASE

ERROR

LEAD

/LAG

FILTER

d(t)

Z -1

d(t-1)

SIGNAL

QUALITY

AND

RSSI

SIN/COS

ROM

DPSK DEMOD

AND AFC

PHASE AND FREQ JAM

COMPLX

MULTPLY

XOR

RX_DATA

DESCRAMBLER

NCO

LEAD

/LAG

FILTER

CHIP

PHASE

DETECT

TIMING

LOOP

FILTER

CLOCK

ENABLE

LOGIC

WALSH

CORREL

SYMBOL

DECISION

SIGN

CORRECT,

PISO

CARRIER

PHASE

DETECT

HIGH RATE SECTION

TIMING

GENERATOR

MCLK

TEST PORT

(36) RXCLK

(32) CCA

(33) RX_PE

(35) RXD

(34) MD_RDY

(5) TX_RDY

(4) TXCLK

(3) TXD

(2) TX_PE

(25) SD

(24) SCLK

(23) SDI

(8) R/W

(9) CS

(28)

RESET

(30)

MCLK

(1) (37) (38) (39) (40) (43) (44) (45) (46)

TEST_CK

FIGURE 14. DSSS BASEBAND PROCESSOR, RECEIVE SECTION

4-23

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