AM4376 datasheet(63/261 Pages) TI

63 / 261 page

AM4376, AM4377, AM4378, AM4379

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SPRS851B – JUNE 2014 – REVISED APRIL 2015

(13) This parameter only applies when this USB PHY terminal is operating in UART3 mode.

(14) This pin is configured as Open-drain and hence is expected to have an external pullup resistor. However there is also an internal PU resistor by default enabled after reset is deasserted.

(15) This terminal is an analog input used to set the switching threshold of the DDR input buffers to (VDDS_DDR / 2).

(16) This terminal is an analog passive signal that connects to an external 49.9 ohm 1%, 20mW reference resistor which is used to calibrate the DDR input/output buffers.

(17) This terminal is analog input that may also be configured as an open-drain output.

(18) This terminal is analog input that may also be configured as an open-source or open-drain output.

(19) This terminal is analog input that may also be configured as an open-source output.

(20) This terminal is high-Z when the oscillator is disabled. This terminal is driven high if RTC_XTALIN is less than VIL, driven low if RTC_XTALIN is greater than VIH, and driven to a

unknown value if RTC_XTALIN is between VIL and VIH when the oscillator is enabled. The oscillator is disabled by default after power is applied.

(21) This terminal provides a Kelvin connection to VDD_MPU. It can be connected to the power supply feedback input to provide remote sensing which compensates for voltage drop in the

PCB power distribution network and package. When the Kelvin connection is not used it should be connected to the same power source as VDD_MPU.

(22) This terminal provides a Kelvin ground reference for the external crystal components. If a crystal circuit is connected to the OSC0_IN/OSC0_OUT terminals, the crystal circuit component

grounds should be connected to this terminal and also be connected to the PCB ground plane close to this terminal. If an external LVCMOS clock source is connected to the OSC0_IN

terminal, this terminal should be connected to VSS.

(23) This terminal provides a Kelvin ground reference for the external crystal components. If a crystal circuit is connected to the OSC1_IN/OSC1_OUT terminals, the crystal circuit component

grounds should be connected to this terminal and also should be connected to the PCB ground plane close to this terminal. If an external LVCMOS clock source is connected to the

OSC1_IN terminal, this terminal should be connected to VSS

Terminal Configuration and Functions

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