Enable And Reset - Texas Instruments DS90UB954-Q1EVM User Manual

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Reference LED Color
D3 Red
D4 Red
D5 Red
D6 Orange
D7 Orange
D8 Orange
D9 Green
D10 Green
D11 Green
D12 Green
D13 Green
D14 Green
D15 Green
D16 Green
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Enable and Reset

The DS90UB954-Q1 is enabled and reset by controlling the PDB input level. PDB has an internal pull
down, and should remain low until all supplies are stable. There are three device enable and reset/power-
down options for the EVM.
• RC timing option: The RC delay created with C123 and R131 connected to the PDB pin is the default
option for delaying PDB on the EVM. This is used for simplicity of debugging and using the device. TI
recommends using a GPIO signal from a host process or to drive PDB after all rails have settled in
customer designs.
• External control option: A momentary push-button switch, SW1, is available for manually driving the
PDB signal low while the button is held.
• Software control option: The PDB pin is also made available in the J24 and J26 CSI-2 output
connectors, allowing a host processor to control the PDB pin.
SNLU223 – August 2017
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Table 12. LEDs
LED Name
VDDIO
VDD5V
VDD_EXT
VPOC_RX1
VPOC_RX0
PASS
LOCK
GPIO6
GPIO5
GPIO4
GPIO3/INTB Illuminates if GPIO3 is HIGH, or GPIO3 disabled (pulled-up)
GPIO2
GPIO1
GPIO0
Copyright © 2017, Texas Instruments Incorporated
Description
Illuminates on VDDIO Power
Illuminates on +5V
Illuminates if 12V Power is applied to DC-IN J24
Illuminates if VPOC_RX1 is ON
Illuminates if VPOC_RX0 is ON
Illuminates if PASS pin is HIGH
Illuminates if LOCK pin is HIGH
Illuminates if GPIO6 is HIGH
Illuminates if GPIO5 is HIGH
Illuminates if GPIO48 is HIGH
Illuminates if GPIO2 is HIGH
Illuminates if GPIO1 is HIGH
Illuminates if GPIO0 is HIGH
DS90UB954-Q1EVM Quick Start
Enable and Reset
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