USB3320C-EZK Standard Microsystems (SMSC), USB3320C-EZK Datasheet - Page 58

• Manufacturer Part Number: USB3320C-EZK
• Description: USB PHY
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB3320C-EZK

• Lead Free Status / RoHS Status: Compliant

Revision 1.0 (07-14-09)
6.5.1
txd
rxd
reserved
int
reserved
R/W
W
W
W
W
SIGNAL
ADDRESS
(HEX)
USB UART Mode
The USB3320 can be placed into UART Mode by first setting the TxdEn and RxdEn bits in the
Control
and RxdEn bits must be written before the CarkitMode bit.
After the CarkitMode bit is set, the ULPI interface will become redefined as described in
the USB3320 will transmit data through the DATA[0] to DM of the USB connector and receive data on
DP and pass the information the Link on DATA[1].
When entering UART mode, the regulator output will automatically switch to the value configured by
the UART RegOutput bits in the
internally to DP and DM. This will hold the UART in its default operating state.
While in UART mode, the transmit edge rates can be set to either the Full Speed USB or Low Speed
USB edge rates by using the XcvrSelect[1:0] bits in the
04
39
19
07
DATA[0]
DATA[1]
DATA[2]
DATA[3]
DATA[4:7]
CONNECTED
Table 6.7 ULPI Register Programming Example to Enter UART Mode
register. Then the Link can set the CarkitMode bit in the
TO
VALUE
(HEX)
0C
49
00
04
Table 6.8 Pin Definitions in Carkit Mode
IN
OUT
OUT
OUT
OUT
DIRECTION
Select FS transmit edge rates
Configure Non-Driving mode
Enable UART connections
USB IO & Power Management
Set regulator to 3.3V
Enable carkit mode
DATASHEET
DESCRIPTION
DESCRIPTION
UART TXD signal that is routed to the DM pin if the TxdEn
is set in the
UART RXD signal that is routed to the DP pin if the RxdEn
bit is set in the
Driven Low.
Asserted when any unmasked interrupt occurs. Active high.
Driven Low.
58
Carkit Control
Function Control
Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Carkit Control
Interface Control
register and a pull-up will be applied
register.
register.
UART RegOutput=00
register.
XcvrSelect=01
CarkitMode=1
OpMode=01
RxdEn=1
TxdEn=1
RESULT
register. The TxdEn
SMSC USB3320
Table
Datasheet
6.8, and
Carkit