NXP Semiconductors MX93AUD-HAT-UM Bedienungsanleitung

MX93AUD-HAT-UM

MX93AUD-HAT Board User Manual

Rev. 1 — 14 April 2023 User manual

Document Information

Information Content

Keywords MX93AUD-HAT-UM, i.MX 93

Abstract The MX93AUD-HAT is an entry level audio evaluation platform that is fully compatible with the

MCIMX93-EVK. It includes a multi-channel codec, S/PDIF, and microphone interfaces. This

document supports Board Revision A and B.

NXP Semiconductors MX93AUD-HAT-UM

MX93AUD-HAT Board User Manual

1 MX93AUD-HAT Overview

The MX93AUD-HAT is an entry level audio evaluation platform that is fully compatible with the MCIMX93-EVK.

It includes a multi-channel codec, S/PDIF, and microphone interfaces.

For further information about MX93AUD-HAT, see http://www.nxp.com/.

1.1 Acronyms and abbreviations

The following table lists the acronyms and abbreviations used in this document.

Term Description

ADC Analog-to-digital converter

DAC Digital-to-analog converter

I2S Inter-IC sound

PDM Pulse density modulation

S/PDIF Sony / Philips Digital InterFace

I2C Inter-integrated circuit

LDO Low dropout regulator

LED Light-emitting diode

Table 1. Acronyms and abbreviations

1.2 Related documentation

The table below lists and explains the additional documents and resources that you can refer to for more

information on the MX93AUD-HAT board. Some of the documents listed below may be available only under a

non-disclosure agreement (NDA). To request access to these documents, contact your local field applications

engineer (FAE) or sales representative.

Document Description Link / how to access

i.MX 93 Applications Processor

Reference Manual

Intended for system software and hardware

developers and application programmers who want

to develop products with i.MX 93 MPU

IMX93RM

i.MX 93 Industrial Application

Processors Data Sheet

Provides information about electrical

characteristics, hardware design considerations,

and ordering information

IMX93IEC

i.MX93 Hardware Developer's

Guide

This document aims to help hardware engineers

design and to test their i.MX 93 processor-based

designs. It provides information about board layout

recommendations and design checklists to ensure

first-pass success and avoidance of board bring-up

problems.

IMX93HDG

Table 2. Related documentation

1.3 Board kit contents

The table below lists the items included in the MX93AUD-HAT hardware kit.

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MX93AUD-HAT Board User Manual

Item Quantity

MX93AUD-HAT 1

Jumper sockets (installed) 5

Table 3. Board kit contents

1.4 Block diagram

The following figure shows the block diagram of the MX93AUD-HAT board.

CS42448

8-CH Line Out,2-CH per Jack

4-CH Line In, 2-CH per Jack

2-CH Microphone, 1-CH per Jack

S/PDIF RX

S/PDIF TX

I2S

8MIC-RPI-MX8

2X20pins

2.54mm pitch

GPIOs

I2C

PDM

S/PDIF RX

S/PDIF TX

2X20pins

2.54mm

pitch

GPIOs

S/PDIF

Buff

Figure 1. MX93AUD-HAT board block diagram

1.5 Board pictures

The following figures show the top and bottom side of the MX93AUD-HAT board, and also highlight the

connectors, jumpers, and LED available on the board.

The outline size of the board is 119 x 63 x 1.6 mm.

The following figure shows the top side of the board, and highlights the connectors available on the board (see

Section 1.7 for detail).

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MX93AUD-HAT Board User Manual

RCA connector (J3)

TOSLINK connector (J16)

TOSLINK connector (J17)

RCA connector (J5)

LINE IN

connectors (J9, J8)

LINE OUT connectors

(J10, J12, J13, J11)

AMIC

connectors (J7, J6)

DMIC connector

(J21)

Figure 2. MX93AUD-HAT top-side view

The following figure shows the bottom side of the board, and highlights the connector available on bottom side

of the board.

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MX93AUD-HAT Board User Manual

AUDIO HAT

connector (J20)

Figure 3. MX93AUD-HAT bottom-side view

The following figure shows the top side of the board, and highlights the jumpers and LEDs available on the

board (seeSection 1.8 and Section 1.9 for detail).

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S/PDIF receiver

(J18)

S/PDIF transmit

(J15)

3V3 LDO power

control (J2)

3V3 path selection

(J4)

5V power control (J1)

Figure 4. MX93AUD-HAT jumpers and LED

1.6 Board features

The table below lists the features of MX93AUD-HAT board.

Board feature Processor feature used Description

Interfacing with Main board 40-pin connector used for MX93AUD-HAT board

connection with the motherboard such as MCIMX93-EVK.

Power 3.3 V MX93AUD-HAT board can be powered either by onboard

3.3 V or 3.3 V from motherboard.

I2C I2C MX93AUD-HAT is configured through the I2C interface at

address 1001 000x.

I2S Supports one onboard codec CS42448 that provides six

multi-bit analog-to-digital and eight multi-bit digital-to-

analog delta-sigma converters.

PDM MX93AUD-HAT board supports one PDM interface (J21) to

connect to the digital microphone board.

Audio

S/PDIF MX93AUD-HAT board provides two TOSLINK+RCA ports

for S/PDIF receive and transmit.

Table 4. Board main features

1.7 Connectors

The following table describes the connectors available on the MX93AUD-HAT board.

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MX93AUD-HAT Board User Manual

Part identifier Connector type Description

J20 2x20-pin connector Audio Hat connector. It is 2.54 mm pitch, female

connector, responsible for communication with

motherboard, such as MCIMX93-EVK and so on. See

Section 1.7.1 for more detail.

J21 2x20-pin connector It is used to provide PDM interface and is used for

connection with digital microphone board 8MIC-RPI-MX8.

J3 RCA connector Coaxial cable connector for digital audio signals

transmission

J16 TOSLINK connector Optical fiber connector for digital audio signals

transmission

J5 RCA connector Coaxial cable receiver connector for digital audio signals

J17 TOSLINK connector Optical fiber receiver connector for digital audio signals

Single-ended analog input connector for CS42448 audio

codec (AIN5B/AIN5A/AIN6B/AIN6A pins)

PJ31360, 3.5 mm audio jack

Differential analog input connector for CS42448 audio

codec (AIN1+/-, AIN2+/-, AIN3+/-, AIN4+/- pins)

J10 CS42448 audio codec Line 1 and Line 2 analog output

connector

J12 CS42448 audio codec Line 3 and Line 4 analog output

connector

J13 CS42448 audio codec Line 5 and Line 6 analog output

connector

J11

PJ31360, 3.5 mm audio jack

CS42448 audio codec Line 7 and Line 8 analog output

connector

Table 5. Connectors

1.7.1 Audio Hat connector

Figure 5 shows the description of each pin of the 2x20-pin connector. This connector supports I2S, 4-lane PDM,

S/PDIF I/O, I2C and some control pins, all signals are 3.3 V logic level.

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P5V

P3V3

P5V

DC_I2C_SDA

GND

DC_I2C_SCL

PDM_CLOCK

GND

DC_I2S1_RX_BCLK

DC_I2S1_MCLK

GND

PUSHBUTTON_INT

SPDIF_OUT

SPDIF_IN

DC_INT

P3V3

GND

DC_RESET 22 21 -

GND

DC_GPIO1

MIC_MUTE_INT

GND 30 29 PDM_BITSTREAM_0

PDM_BITSTREAM_2

PDM_BITSTREAM_1

GND

PDM_BITSTREAM_3

DC_I2S1_TX_BCLK

DC_I2S1_RX_SYNC

DC_I2S1_RX_D0

DC_I2S1_TX_SYNC

DC_I2S1_TX_D0

GND

Figure 5. Audio Hat connector (J20)

Table 6 describes the pin description of the J20 connector. All signals are grouped by functions and their

directions are mentioned with respect to MX93AUD-HAT board.

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MX93AUD-HAT Board User Manual

Number

Pin Name GPIO Mapping I/O Voltage

(V)

Description

3 DC_I2C_SDA GPIO2_I2C4.SDA I/O 3.3

5 DC_I2C_SCL GPIO3_I2C4.SCL I 3.3

I2C bus

7 PDM_CLOCK GPIO4 I 3.3

29 PDM_BITSTREAM_0 GPIO5 O 3.3

31 PDM_BITSTREAM_1 GPIO6 O 3.3

32 PDM_BITSTREAM_2 GPIO12 O 3.3

33 PDM_BITSTREAM_3 GPIO13 O 3.3

PDM interface for 8MIC-RPI-MX8

board

11 DC_I2S1_MCLK GPIO17 I 3.3

12 DC_I2S1_RX_BCLK GIO18 I 3.3

35 DC_I2S1_RX_SYNC GPIO19 I 3.3

38 DC_I2S1_RX_D0 GPIO20 O 3.3

36 DC_I2S1_TX_BCLK GPIO16 I 3.3

37 DC_I2S1_TX_SYNC GPIO26 I 3.3

40 DC_I2S1_TX_D0 GPIO21 I 3.3

I2S interface, include 1-lane RX

and 1-lane TX.

MX93AUD-HAT board (CS42448)

as slave device by default

15 SPDIF_IN GPIO22 O 3.3

16 SPDIF_OUT GPIO23 I 3.3

S/PDIF I/O

13 PUSHBUTTON_INT GPIO27 O 3.3 Button interrupt signal from 8MIC-

RPI-MX8 board

27 MIC_MUTE_INT GPIO0 I 3.3 Mute signal to 8MIC-RPI-MX8

board

18 DC_INT GPIO24 O 3.3 CS42448 interrupt signal

22 DC_RESET GPIO25 I 3.3 Reset CS42448, active low

28 DC_GPIO1 GPIO1 I 3.3 Power control signal, active high

1, 17 P3V3 - Pi 3.3 3.3 V power supply

2,4 P5V - Pi 5.0 5.0 V power supply

9, 14, 20,

25,30, 39

GND - P 0 Ground

Table 6. Audio Hat connector pin description with GPIO mapping

1.8 Jumpers

To facilitate the development and debugging and for the diversity of functions, some jumpers have been added

to the MX93AUD-HAT board. The following table describes the jumpers available on the board.

Part identifier Jumper type Name/Function Settings

J1 1x2 header 5 V power control •Open: Disconnect 5 V power supply from

the motherboard to the MX93AUD-HAT

board

Table 7. Jumper Description

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Part identifier Jumper type Name/Function Settings

•Shorted: Connect 5 V power supply from

the motherboard to the MX93AUD-HAT

board [Default setting]

J2 1x2 header 3V3 LDO power control •Open: Disconnect 3.3 V LDO U1 input path

•Shorted: Connect 3.3 V LDO U1 input path

[Default setting]

J4 1x3 header 3.3 V path selection •1-2 shorted: 3.3 V source from motherboard

•2-3 shorted: 3.3 V source from on board

LDO (default setting)

J15 1x3 header S/PDIF transmit •1-2 shorted: TOSLINK port is used for S/

PDIF transmit

•2-3 shorted: RCA port is used for S/PDIF

transmit (default setting)

J18 1x3 header S/PDIF receiver •1-2 shorted: TOSLINK port is used as S/

PDIF receiver

•2-3: RCA port is used as S/PDIF receiver

(default setting)

Table 7. Jumper Description...continued

1.9 LED

The MX93AUD-HAT board has one LED with detail as below:

•LED color - Red

•Part Identifier - D1

•LED name - 5 V

•Description - LED for 5 V power supply. When On, indicates that 5 V power supply is available on board.

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