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Philips Semiconductors
USB 2-port hub
BLOCK DIAGRAM
3.3V
1.5k
D+
SoftConnect
ANALOG
GOODLINK
ANALOG
T
/R
T
/R
CONTROL
X
X
X
D+
D–
LED
D+
DOWNSTREAM
DOWNSTREAM
PORT 2
NOTE:
1. This is a conceptual block diagram and does not include each individual signal.
1999 Jul 22
UPSTREAM
PORT
D+
D–
ANALOG
T
/R
X
X
FULL SPEED
HUB
REPEATER
GOODLINK
CONTROL
X
D–
LED
PORT 3
12 MHz
PLL
BIT CLOCK
RECOVERY
PHILIPS
SIE
END OF
FRAME
TIMERS
CONNECTION
3
Product specification
PDIUSBH12
INTEGRATED
RAM
2
I
C
MEMORY
MANAGEMENT
SLAVE
INTERFACE
UNIT
GENERAL
PORT
CONTROLLER
INTERRUPT
SDA SCL
NO LIGHT
LIT
BLINKING
NO
DATA
CONNECTED
TRANSFER
GOODLINK
SV00852
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