HFA3860 Datasheet, PDF (19/40 Pages) Intersil Corporation – 11 Mbps Direct Sequence Spread Spectrum Baseband Processor

HFA3860
V_DD (ANALOG)
(10, 18, 20)
GND (ANALOG)
(11, 15, 19)
V_DD (DIGITAL)
(7, 21, 29, 42)
GND (DIGITAL)
(6, 22, 31, 41)
I_IN (12)
Q_IN (13)
V_REFP (16)
V_REFN (17)
HIGH RATE (MBOK) MODULATOR
MODIFIED
WALSH GEN
MODIFIED
WALSH GEN
SIGN BIT
A
SIPO
SIGN BIT
B
SIPO
CLOCK ENABLE
LOGIC
(36) RXCLK
(32) CCA
B/Q
MUX
RSSI (14)
ANTSEL (26)
ANTSEL (27)
I_OUT (48)
Q_OUT (47)
XOR
XOR
DPSK MODULATOR
I ^CLK
DIFFERENTIAL
ENCODER
b(t) _{Z -1} b(t-1)
XOR
Q
MUX CLK
FOR DQPSK
I CH ONLY FOR DBPSK
11-BIT PN AT
CHIP RATE
SPREADER
TIMING
GENERATOR
MCLK
TX_DATA
SCRAMBLER
TEST PORT
(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 11. DSSS BASEBAND PROCESSOR, TRANSMIT SECTION
4-19