Texas Instruments AM1808 User Manual page 39

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3.7.17 Universal Serial Bus Modules (USB0, USB1)
SIGNAL
NAME
USB0_DM
USB0_DP
USB0_VDDA33
USB0_ID
USB0_VBUS
USB0_DRVVBUS
AHCLKX / USB_REFCLKIN / UART1_CTS /
GP0[10] / PRU0_R31[17]
USB0_VDDA18
USB0_VDDA12
USB_CVDD
USB1_DM
USB1_DP
AHCLKX / USB_REFCLKIN / UART1_CTS /
GP0[10] / PRU0_R31[17]
USB1_VDDA33
USB1_VDDA18
USB_CVDD
(1) I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal.
Note: The pin type shown refers to the input, output or high-impedance state of the pin function when configured as the signal name
highlighted in bold. All multiplexed signals may enter a high-impedance state when the configured function is input-only or the configured
function supports high-Z operation. All GPIO signals can be used as input or output. For multiplexed pins where functions have different
types (ie., input versus output), the table reflects the pin function direction for that particular peripheral.
(2) IPD = Internal Pulldown resistor; IPU = Internal Pullup resistor; CP[n] = configurable pull-up/pull-down (where n is the pin group) using
the PUPDENA and PUPDSEL registers in the System Module. The pull-up and pull-down control of these pins is not active until the
device is out of reset. During reset, all of the pins associated with these registers are pulled down. If the application requires a pull-up,
an external pull-up can be used. For more detailed information on pullup/pulldown resistors and situations where external
pullup/pulldown resistors are required, see the
circuits, see the Device Operating Conditions
(3) This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can
be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of
power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power
supply DVDD3318_C.
Copyright © 2010–2014, Texas Instruments Incorporated
Table 3-19. Universal Serial Bus (USB) Terminal Functions
TYPE
NO.
USB0 2.0 OTG (USB0)
M18 A
M19 A
N18 PWR
P16 A
N19 A
K18 O
A3 I
N14 PWR
N17 A
M12 PWR
USB1 1.1 OHCI (USB1)
P18 A
P19 A
A3 I
P15 PWR
P14 PWR
M12 PWR
Device Configuration
section.
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SPRS653E – FEBRUARY 2010 – REVISED MARCH 2014
POWER
(1) (2)
PULL
(3)
GROUP
IPD — USB0 PHY data minus
IPD — USB0 PHY data plus
— — USB0 PHY 3.3-V supply
USB0 PHY identification
— —
(mini-A or mini-B plug)
— — USB0 bus voltage
IPD B USB0 controller VBUS control output.
CP[0] A USB_REFCLKIN. Optional clock input
— — USB0 PHY 1.8-V supply input
USB0 PHY 1.2-V LDO output for bypass cap
For proper device operation, this pin must
— — always be connected via a 0.22-μF capacitor
to VSS (GND), even if USB0 is not being
used.
USB0 and USB1 core logic 1.2-V supply
— —
input
— — USB1 PHY data minus
— — USB1 PHY data plus
CP[0] A USB_REFCLKIN. Optional clock input
— — USB1 PHY 3.3-V supply
— — USB1 PHY 1.8-V supply
USB0 and USB1 core logic 1.2-V supply
— —
input
section. For electrical specifications on pullup and internal pulldown
AM1808
AM1808
DESCRIPTION
Device Overview 39