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Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo
Revision 2.0 (10-03-08) 16 SMSC USB2640/USB2641
DATASHEET
Figure 5.2 USB2641 Block Diagram
To Upstream
V
BUS
3.3V
Upstream
PHY
Upstream USB
Data
Repeater
Controller
Serial
Interface
Engine
Serial
Interface
PLL
24 MHz
Crystal
Routing & Port Re-Ordering Logic
Port Controller
PHY
Port #3
OC
Sense
Switch
Driver
Bus-Power
Detect/V
BUS
Pulse
1.8V
Transaction
Translator
1.8V Reg
PHY
Port #2
OC
Sense
Switch
Driver
USB Data
Downstream
OC Sense/
Pwr Switch
8051
PROCESSOR
SFR
RAM
XDATA BRIDGE
+ BUS ARBITER
ROM
64K
RAM
6K
ADDR
MAP
GPIOs
Program Memory I/O Bus
PWR_FET0
6 pins
GPIO10 (CRD_PWR)
3K
total
RAM
EP2 TX
EP2 RX
BUS
INTFC
EP0 TX
EP0 RX
SIE
CTL
BRIDGE
BUS
INTFC
FMDU
CTL
AUTO_CBW
PROC
BUS
INTFC
USB Data
Downstream
OC Sense/
Pwr Switch
SPI
SPI / GPIO (2 pins)
FMI
Flash Media
Cards
(require Combo
socket)
MS
SD/
MMC