NXP IMX-MIPI-HDMI Daughter Card Schematics

Part Number: IMX-MIPI-HDMI

Manufacturer: NXP Semiconductors

This document contains information proprietary to NXP and shall not be used for engineering design, procurement or manufacture in whole or in part without the express written permission of NXP Semiconductors.

Revision History

REV	Revision Notes	Date
A1	Initial release	27-01-2017
B1	Mini SAS connector is updated with shell part	26-05-2017
C1	All parts updated from FCL library	23-01-2018

Content Overview

The document details the following sections:

Front Page
Title Page
Block Diagram
MIPI to HDMI Converter
MIPI Connector
HDMI Connector
Miscellaneous

Note: DNP (Do Not Populate) appearing near a component signifies that these parts are not installed.

Block Diagram: MIPI - DSI to HDMI Conversion

This section provides a high-level overview of the daughter card's functionality. It shows the data flow from a MIPI-DSI interface to an HDMI output.

MIPI-DSI Connector (mini SAS): Receives MIPI-DSI signals including clock (DSI_CLK_P/N), data lanes (DSI_D0_P/N, DSI_D1_P/N, DSI_D2_P/N, DSI_D3_P/N), and control signals (DSI_SCL, DSI_SDA).
MIPI to HDMI Transmitter (ADV7535): This integrated circuit processes the MIPI-DSI signals and converts them into an HDMI format. It handles differential clock and data pairs (DRXC+/-, DRX0+/-, DRX1+/-, DRX2+/-, DRX3+/-) and I2C communication (SDA/SCL).
HDMI Connector (Type-A): Outputs the converted video and audio signals in HDMI format. This includes differential data lanes (HDMI_TX0_P/N, HDMI_TX1_P/N, HDMI_TX2_P/N), differential clock (HDMI_TXC_P/N), DDC (Display Data Channel) signals (DDC_SDA, DDC_SCL), and Hot Plug Detect (HPD).
Power Rails: The diagram indicates various power supply voltages used, such as 1V8, 3V3, and 5V0.
Protection: TVS diodes (e.g., RCLAMP0524J) are shown for signal protection.

MIPI to HDMI Converter Details (ADV7535)

This section details the schematic of the ADV7535 chip, the core component for MIPI to HDMI conversion.

MIPI Interface:

Input Signals: DSI_DRXC_P/N, DSI_DRX0_P/N, DSI_DRX1_P/N, DSI_DRX2_P/N, DSI_DRX3_P/N, DSI_SDA, DSI_SCL.
Output Signals: HDMI_TXC_P/N, HDMI_TX0_P/N, HDMI_TX1_P/N, HDMI_TX2_P/N, DDC_SCL, DDC_SDA, HDMI_HPD, CEC.

Power and Ground: The ADV7535 requires multiple power supplies including AVDD, DVDD, A2VDD, PVDD, and VCC, with associated filtering capacitors (e.g., 10uF, 0.1uF) and ferrite beads for noise suppression.

Control and Configuration: Includes signals like DSI_INT_OUT, CEC, SCLK/MCLK, LRCLK, SPDIF/I2S. The chip has an I2C address of 0x72 for configuration.

Passive Components: Various resistors (e.g., 1.00k, 2.00k, 4.7K, 47K) and capacitors are used for signal termination, pull-ups/downs, and filtering.

MIPI Connector (mSAS)

This section details the MIPI interface connector, identified as an mSAS connector (J5).

Pinout: The connector provides access to MIPI-DSI signals:

Data Lanes: DSI_DRXC_P/N, DSI_DRX0_P/N, DSI_DRX1_P/N, DSI_DRX2_P/N, DSI_DRX3_P/N.
Control/Other: DSI_BL_PWM (Backlight PWM), DSI_INT_OUT (Interrupt Output), DSI_SDA (I2C Data), DSI_SCL (I2C Clock).
Power: VCC_1V8, VCC_3V3, VCC_5V0.

LED Indication: A sub-circuit shows LED indicators:

A Yellow-Green LED connected via a 100 Ohm resistor to VCC_3V3, controlled by DSI_BL_PWM through a 2.00k resistor and a MMBT3904LT1G transistor.
A Red LED connected via a 330 Ohm resistor to VCC_5V0.

HDMI Connector (Type-A)

This section details the HDMI Type-A connector (J2) for outputting the video and audio signals.

Data Lanes: The connector carries four differential data lanes for video and audio transmission:

Lane 2: HDMI_TX2_P/N (connected to D2+/D2-).
Lane 1: HDMI_TX1_P/N (connected to D1+/D1-).
Lane 0: HDMI_TX0_P/N (connected to D0+/D0-).
Clock Lane: HDMI_TXC_P/N (connected to CK+/CK-).

Control Signals:

DDC: DDC_SCL and DDC_SDA for communication with the display.
CEC: Consumer Electronics Control signal.
HPD: Hot Plug Detect signal (HDMI_HPD).

Power and Ground: Includes VCC_HDMI_5V0 and various ground connections (GND, SHELL1-4).

Impedance Matching: Transmission lines (FL1-FL4) with 120 Ohm impedance are used for the differential data and clock lanes.

Protection: TVS diodes (RCLAMP0524J) are used for signal protection on data lanes and DDC signals.

Filtering: Capacitors (e.g., 10uF, 0.1uF, 1000pF) and resistors are used for power supply filtering and signal integrity.

Miscellaneous Components

This section covers auxiliary elements on the board:

Fiducials: Three fiducial markers (FD1, FD2, FD3), each 40mil in size, are provided for automated assembly alignment.
Test Points: Several test points (TP1-TP5) are available for monitoring key voltage rails: VCC_1V8, VCC_3V3, and VCC_5V0.
Mounting Holes: Eight mounting holes (MH1-MH8) are present for securing the daughter card to a chassis or other structure.

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