AM1808AZCED3 datasheet(41/264 Pages) TI

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AM1808

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SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010

3.7.17 Universal Serial Bus Modules (USB0, USB1)

Table 3-19. Universal Serial Bus (USB) Terminal Functions

SIGNAL

POWER

TYPE(1)

PULL(2)

DESCRIPTION

GROUP(3)

NAME

NO.

USB0 2.0 OTG (USB0)

USB0_DM

M18

IPD

—

USB0 PHY data minus

USB0_DP

M19

IPD

—

USB0 PHY data plus

USB0_VDDA33

N18

PWR

—

USB0 PHY 3.3-V supply

USB0 PHY identification

USB0_ID

P16

—

(mini-A or mini-B plug)

USB0_VBUS

N19

—

USB0 bus voltage

USB0_DRVVBUS

K18

IPD

USB0 controller VBUS control output.

AHCLKX / USB_REFCLKIN / UART1_CTS /

CP[0]

USB_REFCLKIN. Optional clock input

GP0[10] / PRU0_R31[17]

USB0_VDDA18

N14

PWR

—

USB0 PHY 1.8-V supply input

USB0_VDDA12

N17

—

USB0 PHY 1.2-V LDO output for bypass cap

USB0 and USB1 core logic 1.2-V supply

USB_CVDD

M12

PWR

—

input

USB1 1.1 OHCI (USB1)

USB1_DM

P18

—

USB1 PHY data minus

USB1_DP

P19

—

USB1 PHY data plus

AHCLKX / USB_REFCLKIN / UART1_CTS /

CP[0]

USB_REFCLKIN. Optional clock input

GP0[10] / PRU0_R31[17]

USB1_VDDA33

P15

PWR

—

USB1 PHY 3.3-V supply

USB1_VDDA18

P14

PWR

—

USB1 PHY 1.8-V supply

USB0 and USB1 core logic 1.2-V supply

USB_CVDD

M12

PWR

—

input

(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 weakly pulled down. If the application requires a

pull-up, an external pull-up can be used.

(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.

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