ISL3873A Datasheet, PDF (2/42 Pages) Intersil Corporation – Wireless LAN Integrated Medium Access Controller with Baseband Processor

Simplified Block Diagram
HOST
COMPUTER
ISL3873A
DATA
ADDRESS
CONTROL
USB
PC CARD
HOST
INTERFACE
USB
HOST
INTERFACE
ISL3873A
MICRO-
PROGRAMMED
MAC ENGINE
WEP
ENGINE
ON-CHIP
ROM
ON-CHIP
RAM
MEMORY
CONTROLLER
AGC
CTL
PHY
INTERFACE
(MDI)
SERIAL
CONTROL
(MMI)
DEMOD
DATA I/O
I/O
MOD
TX
ALC
1
THRESH.
1 _DETECT
7
IF
DAC
6
I ADC
6
Q ADC
6 I DAC
6
Q DAC
7
TX
DAC
6
TX
ADC
ANT_SEL
RX_RF_AGC
RX_IF_DET
RX_IF_AGC
RXI±
RXQ±
V_REF
TXI±
TXQ±
TX_IF_AGC
TX_AGC_IN
PRISM RADIO
RF SECTION
MEDIUM ACCESS
CONTROLLER
BASEBAND PROCESSOR
RADIO AND SYNTH
SERIAL CONTROL
ADDRESS
DATA
SELECT
EXTERNAL
SRAM AND
FLASH
MEMORY
44MHz CLOCK
SOURCE †
† THE ISL3873A MUST BE SUPPLIED WITH A
SEPARATE CLOCK WHEN USB IS USED.
2