LAN9730 Datasheet, PDF (23/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
TABLE 2-5: USB PINS
Num Pins
1
Name
HSIC Data
Symbol
HSIC_DATA
1
HSIC Strobe HSIC_STROBE
1
HSIC Slew
SLEW_TUNE
Tune
1
External USB
USBRBIAS
Bias Resistor
Buffer
Type
HSIC
HSIC
IS
(PD)
AI
Description
Bi-directional Double Data Rate (DDR) data sig-
nal that is synchronous to the HSIC_STROBE
signal as defined in the High-Speed Inter-Chip
USB Electrical Specification, Version 1.0.
Bi-directional data strobe signal as defined in the
High-Speed Inter-Chip USB Electrical Specifica-
tion, Version 1.0.
Applies a 30% slew rate boost to the HSIC_DATA
and HSIC_STROBE pins when driven high.
Used for setting HS transmit current level and on-
chip termination impedance. Connect to an exter-
nal 12.0 kΩ 1.0% resistor to ground.
TABLE 2-6: ETHERNET PHY PINS
Num Pins
Name
1
Ethernet TX
Data Out
Negative
1
Ethernet TX
Data Out
Positive
1
Ethernet RX
Data In Nega-
tive
1
Ethernet RX
Data In Posi-
tive
1
PHY Inter-
rupt (Internal
PHY Mode)
Symbol
TXN
TXP
RXN
RXP
nPHY_INT
PHY Interrupt
(External
PHY Mode)
nPHY_INT
1
External PHY
EXRES
Bias Resistor
Buffer
Type
AIO
AIO
AIO
AIO
O8
IS
(PU)
AI
Description
The transmit data outputs may be swapped inter-
nally with receive data inputs when Auto-MDIX is
enabled.
The transmit data outputs may be swapped inter-
nally with receive data inputs when Auto-MDIX is
enabled.
The receive data inputs may be swapped inter-
nally with transmit data outputs when Auto-MDIX
is enabled.
The receive data inputs may be swapped inter-
nally with transmit data outputs when Auto-MDIX
is enabled.
In Internal PHY Mode, this pin can be configured
to output the internal PHY interrupt signal.
Note: The internal PHY interrupt signal is
active-high.
In External PHY Mode, the active-low signal on
this pin is input from the external PHY and indi-
cates a PHY interrupt has occurred.
Used for the internal bias circuits. Connect to an
external 12.0 kΩ 1.0% resistor to ground.
 2012-2015 Microchip Technology Inc.
DS00001946A-page 23