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USBB1_ULPIPHY_CLK/GPIO_84
USBB1_ULPIPHY_STP/GPIO_85
USBB1_ULPIPHY_DIR/GPIO_86
USBB1_ULPIPHY_NXT/GPIO_87
USBB1_ULPIPHY_DAT0/GPIO_88
USBB1_ULPIPHY_DAT1/GPIO_89
USBB1_ULPIPHY_DAT2/GPIO_90
USBB1_ULPIPHY_DAT3/GPIO_91
USBB1_ULPIPHY_DAT4/GPIO_92
USBB1_ULPIPHY_DAT5/GPIO_93
USBB1_ULPIPHY_DAT6/GPIO_94
USBB1_ULPIPHY_DAT7/GPIO_95
FREF_CLK3_OUT/GPIO_WK31
See Table 9 for the definition of the GPIOs used to provide USB Host Port/Ethernet functions.
GPIO
GPIO_1
GPIO_62
GPIO_WK31
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TM
OMAP
4 PandaBoard System
Reference Manual
I
O
CLKOUT
IO
I
STP
IO
O
DIR
IO
O
NXT
IO
IO
DAT0
IO
IO
DAT1
IO
IO
DAT2
IO
IO
DAT3
IO
IO
DAT4
IO
IO
DAT5
IO
IO
DAT6
IO
IO
DAT7
O
R44
I
REFCLK
Volt. Trans.
U5 (DNI)
GPIO_62
O
I
RESETB
O
I
GPIO_1
EN
Figure 16 – Panda USBB1 Interface Block Diagram
Dir.
Signal Name
HUB_NPD/
O
HUB_LDO_EN
HUB_NRESET/
O
HUB_NRESET_3V3
O
USBB1_PHY_REFCLK
Table 9: USB Host Port/Ethernet GPIO Definitions
DP
IO
IO
USBDP0
IO
DM
IO
USBDM0
I
n_RESET
P
VDD33IO
P
VDD33A
(U11)
P
OUT
Enable to the Hub 3.3V LDO @ U11 (note: this
GPIO goes through a voltage translator to provide
adequate V
margin on the LDO enable input).
ih
1 = Enable Hub LDO
0 = Power Down Hub LDO
USB/Ethernet Hub Reset
0 = Hub & Phy held in reset
1 = Normal operation.
This pin needs to be used as FREF_CLK3_OUT,
and programmed to output 19.2 MHz
Revision 0.4
September 22, 2010
DOC-21010
(J9)
USBDP2
IO
USBDM2
IO
USBDP3
IO
USBDM3
IO
I
RXP
RXN
I
TXP
O
O
TXN
IO
USBDP4
USBDM4
IO
(J6)
USBDP5
IO
USBDM5
IO
Description
Page 41 of 83
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