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Revision 0.1
OMAP4460 Pandaboard ES
System Reference Manual
September 29, 2011
DOC-21054
OMAP4460
USB3320C
(U7)
LAN9514
(U8)
USB (2x) &
RJ-45
(J9)
USBB1_ULPIPHY_CLK/GPIO_84
USBB1_ULPIPHY_STP/GPIO_85
USBB1_ULPIPHY_DIR/GPIO_86
USBB1_ULPIPHY_NXT/GPIO_87
I
IO
IO
IO
O
I
O
O
CLKOUT
STP
DIR
NXT
USBDP2
USBDM2
USBDP3
USBDM3
IO
IO
IO
IO
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
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
DAT0
DAT1
DAT2
DAT3
DAT4
DP
DM
IO
IO
IO
IO
USBDP0
USBDM0
RXP
RXN
TXP
TXN
I
I
O
O
USBB1_ULPIPHY_DAT5/GPIO_93
IO
IO
DAT5
USBB1_ULPIPHY_DAT6/GPIO_94
USBB1_ULPIPHY_DAT7/GPIO_95
FREF_CLK3_OUT/GPIO_WK31
IO
IO
O
R47
IO
IO
I
DAT6
DAT7
REFCLK
I
P
P
n_RESET
VDD33IO
VDD33A
USBDP4
USBDM4
USBDP5
IO
IO
IO
Expansion
Connector
(J6)
Volt. Trans.
U4 (DNI)
USBDM5
IO
GPIO_62
O
I
RESETB
Voltage Translator
(1.8v -> 3.3v)
TPS73633
(U9)
GPIO_1
O
I
EN
OUT
P
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
Enable to the Hub 3.3V LDO @ U9 (note: this
GPIO_1
O
HUB_NPD/
HUB_LDO_EN
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
GPIO_WK31
O
O
HUB_NRESET/
HUB_NRESET_3V3
USBB1_PHY_REFCLK
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
Table 10: USB Host Port/Ethernet GPIO Definitions
2.17
Expansion Connectors (J3 & J6)
Page 41 of 82
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