OMAP4460 Pandaboard ES
System Reference Manual
Revision 0.1
September 29, 2011
DOC-21054
Page 41 of 82
OMAP4460
USBB1_ULPIPHY_CLK/GPIO_84
I
USBB1_ULPIPHY_STP/GPIO_85
IO
USBB1_ULPIPHY_DIR/GPIO_86
IO
USBB1_ULPIPHY_NXT/GPIO_87
IO
USBB1_ULPIPHY_DAT0/GPIO_88
IO
USBB1_ULPIPHY_DAT1/GPIO_89
IO
USBB1_ULPIPHY_DAT2/GPIO_90
IO
USBB1_ULPIPHY_DAT3/GPIO_91
IO
USBB1_ULPIPHY_DAT4/GPIO_92
IO
USBB1_ULPIPHY_DAT5/GPIO_93
IO
USBB1_ULPIPHY_DAT6/GPIO_94
IO
USBB1_ULPIPHY_DAT7/GPIO_95
IO
USB3320C
(U7)
DIR
STP
I
O
CLKOUT
O
NXT
O
DAT0
IO
DAT2
DAT1
IO
IO
DAT3
IO
DAT4
IO
DAT6
DAT5
IO
IO
DAT7
IO
REFCLK
I
FREF_CLK3_OUT/GPIO_WK31
O
RESETB
I
GPIO_62
O
DP
IO
DM
IO
LAN9514
(U8)
USBDM0
IO
USBDP0
IO
USBDP2
IO
USBDM2
IO
USBDP3
IO
USBDM3
IO
USBDP4
IO
USBDM4
IO
USBDP5
IO
USBDM5
IO
RXP
I
RXN
I
TXP
O
TXN
O
USB (2x) &
RJ-45
(J9)
Expansion
Connector
(J6)
GPIO_1
O
EN
I
TPS73633
(U9)
OUT
P
n_RESET
I
Voltage Translator
(1.8v -> 3.3v)
VDD33IO
P
VDD33A
P
Volt. Trans.
U4 (DNI)
R47
Figure 15 – Panda USBB1 Interface Block Diagram
See Table 10 for the definition of the GPIOs used to provide USB Host Port/Ethernet functions.
GPIO
Dir.
Signal Name
Description
GPIO_1 O
HUB_NPD/
HUB_LDO_EN
Enable to the Hub 3.3V LDO @ U9
(note: this
GPIO goes through a voltage translator to provide
adequate V
ih
margin on the LDO enable input).
1 = Enable Hub LDO
0 = Power Down Hub LDO
GPIO_62 O
HUB_NRESET/
HUB_NRESET_3V3
USB/Ethernet Hub Reset
0 = Hub & Phy held in reset
1 = Normal operation.
GPIO_WK31 O USBB1_PHY_REFCLK
This pin needs to be used as FREF_CLK3_OUT,
and programmed to output 19.2 MHz
Table 10: USB Host Port/Ethernet GPIO Definitions
2.17
Expansion Connectors (J3 & J6)
electronic components distributor
