Philips Integrated Circuits PDIUSBH12 - Manual (Page 3)

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