
4.0 System Architecture and
Reference Design
4.1 AU6331 Block Diagram
Figure 4.1 AU6331 Block Diagram
USB
Upstream
Port
XCVR
USB
SIE
RAM
SD/MMC/MS
Control FIFO
SD
MMC
MS
2.5 V
Processor
ROM
Arbitrator
2.5V
Voltage
Regulator
/Power Switch
3.3V
12MHz
XTAL
AU6331 USB 2.0 SD/MMC/MS Single/Dual LUN Flash Memory Card Reader V1.02W
Official release _ Public
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