Socionext CecTalker Manuel utilisateur

Socionext Inc.

cecTalker HDMI Model (SCF95A00) User Manual

https://www.socionext.com/en/

cecTalker HDMI Model

(SCF95A00)

User Manual

Document code: MN04-00015-1E

Revision 1.0

Dec. 4, 2020

Socionext Inc.

cecTalker HDMI Model (SCF95A00) User Manual

https://www.socionext.com/en/

1/19

◼Introduction

We really appreciate your purchase of the “cecTalker” HDMI model (SCF95A00). This product is the HDMI

module*1 capable of designing UI/UX of the device equipped with HDMI terminals easily. This document

describes the usage of this product. Please be sure to read it before use. If you have any questions, please contact

our sales department or make inquiries using the inquiry form described in Section 5.4.

Note:

*1: Hereinafter, referred to as the “Module”.

◼For safety use

This document describes the important information for using this product safely. Be sure to read it before use and

use this product correctly according to this information. In particular, read the section "Warnings and cautions for

this product" described later carefully and use this product after completely confirming the safety. Keep this

document carefully.

◼Handling method and usage

For the handling method, usage, and notice for safe use of this product, refer to this document.

◼Contents of this document

The contents of this document are as of the date of issue and may be revised without prior notice. For the latest

information, see our website.

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◼Warnings and cautions for this product

The following warnings apply to this product:

Warning

Indicates the presence of a hazard that may result in death or serious injury or that

may cause failure for the customer's system if the instruction is ignored.

Electrical shock/failure

Do not touch this product and power adapter if it is thundering. Electrical shock may

be caused.

Electrical shock/failure

Do not insert metallic piece in the internal of this product and do not wet this

product with liquid. Electrical shock or fire may be caused due to overheating or

short of electrical circuit.

Electrical shock/failure

Do not take this product apart or modify it. The abnormal operation of this product

may be caused. In addition, electrical shock or fire may be caused due to circuit

failure.

Soldering may be needed to connect this product with single board computer. In this

case, perform it at your own responsibility.

Fire/failure

Do not use power adapter other than 5 V. Fire may be caused due to overheating.

Fire/failure

Do not place this product in abnormally high temperature environment. Fire may be

caused.

The following cautions apply to this product:

Caution

Indicates that there may be the following cautions if the instruction is ignored:

- Slight or middle injury may be resulted.

- This product or the equipment connected with this product may be damaged.

- The software asset such as the data or other assets may be broken.

Injury/failure

Do not move this product with codes and cables connected. Catching the connected

code/cable may cause injury.

Injury/failure

Do not place this product in unstable location. Falling it may cause injury.

Failure

Do not connect HDMI input with HDMI input. This product may be broken due to

abnormal current.

Failure

To prevent this product from damaging due to electrostatics discharge, do not touch

the metal part of connectors. Discharge the static electricity charged on a human

body before touching this product.

Failure

There is not a chassis for this product. Therefore, it is recommended that this product

is put in the packaging box when preserving it. When transporting this product, use

the packaging materials of delivery to prevent this product from damaging.

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The contents of this document may be revised without prior notice. Contact our sales department for

confirmation.

The furnishing of this specification does not give users any license to Socionext's industrial property.

The information and circuit diagrams in this document are presented as examples of semiconductor devices

applications and are not intended for incorporation into devices for actual use. Socionext Inc. shall assume no

responsibility for infringement of any patent rights or other rights of third parties arising from the use of this

information or circuit diagrams.

This product is designed and manufactured for use in consumer and professional applications. Customers

considering the use of this product in specialized applications where failure or malfunction could directly affect

human life or cause physical injury, or where extremely high levels of reliability are required (such as air traffic

control, aerospace systems, atomic energy control, medical devices for life support) are requested to consult our

sales representative before embarking on such specialized use. Socionext Inc. will not be held liable for any

claims and/or damages arising from uses such as those described above without the prior approval of the

company.

Because all semiconductor devices inherently have a certain rate of failure, the user must incorporate into

facilities and equipment safety design measures such as redundancy, fire protection, and measures for preventing

overcurrent levels and other abnormal operating conditions to protect against injury, fire damage, or loss that

could be incurred by the public in the event of a failure.

To export the product described in this document if it corresponds to goods or technology restricted by the

"Foreign Exchange and Foreign Trade Law," export of the product must be permitted by the Law.

Company and product names and proper names in this document are trademarks or registered trademarks of their

respective companies.

Socionext Inc.

cecTalker HDMI Model (SCF95A00) User Manual

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4/19

◼Revision History

Date

Revision

Description

Dec. 4, 2020

1.0

First edition

 
Socionext Inc. 
cecTalker HDMI Model (SCF95A00) User Manual 
https://www.socionext.com/en/ 
5/19 
Copyright 2020 
 
◼Contents 
About cecTalker.................................................................................................................6
1. Overview .....................................................................................................................................................6
2. Features ......................................................................................................................................................6
3. Product specification ...................................................................................................................................6
4. Module configuration...................................................................................................................................7
5. Deliverables ................................................................................................................................................8
Details of cecTalker ...........................................................................................................9
1. HDMI input ..................................................................................................................................................9
2. HDMI output ................................................................................................................................................9
3. CEC function ...............................................................................................................................................9
4. LED indicator...............................................................................................................................................9
5. HDCP repeater function ............................................................................................................................10 
6. Color format conversion ............................................................................................................................10 
7. HDR and BT.2020 signal...........................................................................................................................10 
8. EDID setting ..............................................................................................................................................10 
9. USB connector ..........................................................................................................................................10 
10. Connecting two or more cecTalker modules to one television...................................................................11 
Usage of cecTalker ..........................................................................................................12 
1. Starting procedure.....................................................................................................................................12 
2. UART connection ......................................................................................................................................12 
3. Connection to PC (external control device) ...............................................................................................13 
4. Connection to SPRESENSE .....................................................................................................................14 
5. Connection to Raspberry Pi ......................................................................................................................16 
External Control Command ............................................................................................17 
1. UART command........................................................................................................................................17 
2. Control flow ...............................................................................................................................................17 
Appendix ..........................................................................................................................18 
1. Troubleshooting.........................................................................................................................................18 
2. Notes.........................................................................................................................................................18 
3. Use in each country...................................................................................................................................19 
4. Inquiry .......................................................................................................................................................19 

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1. About cecTalker

1.1. Overview

The cecTalker module is the 4K60p supported HDMI selector and provides the “CEC*1 switching function”*2

which switches the HDMI port by the CEC control. The Module can switch the HDMI port from the external by

the UART communication and control the device connected through HDMI.

The Module can be controlled by directly connecting SPRESENSE*3 or Raspberry Pi*4 to it. See Section 3.4 for

the connection procedure of SPRESENSE or Section 3.5 for the connection procedure of Raspberry Pi.

Notes:

*1: CEC (Consumer Electronics Control) is a function for cooperating the devices by exchanging the control

signals between the devices such as a television or a recorder.

*2: The CEC switching function is a function for automatically switching the HDMI input port of the Module.

The HDMI input port is automatically switched when the source device such as the player connected to the

Module is powered on or the play button of this device is pushed.

*3: SPRESENSE is a trademark of Sony Corporation.

*4: Raspberry Pi is a registered trademark of Raspberry Pi Foundation.

1.2. Features

The features of cecTalker are as follows:

• HDMI 3-input and 1-output, 4K60p, and YUV444 supported

• HDCP 2.3 supported

• Up-conversion video output from 2K to 4K.

The low delay (0.1 frame period or less) is provided by completing a process within the same frame.

• The HDMI port switching and the device control by the CEC command are available by the UART control

from the external.

• The CEC switching function is provided and the HDMI port can be automatically switched by the CEC

control.

1.3. Product specification

The product specification of cecTalker is as follows.

Table 1: Product Specification

Function

Specification

Input

HDMI 2.0 * 3, Mini Type A (HDCP 2.3 supported)

Output

HDMI 2.0 * 1, Mini Type A (HDCP 2.3 supported)

Switch

• Reset switch

• HDMI selector switch (HDMI input port is switched by pushing it.)

Status indicator

• Power on indicator (Green LED)

• Connection/selection status indicator of HDMI input port (Red/green LED * 3)

UART

• Half-duplex communication

• Communication setting: 115,200 bps, 8-bit, No parity, 1 stop bit

Scaler

Upscaling conversion: 2K to 4K (3840x2160)

Video quality processing

Super-resolution of adaptive filtering type (Super-resolution processing is completed within

one frame period.)

Power supply

USB power feeding (+5V@1A type recommended)

Power consumption: 5 W or less

Module size

85 mm (W) x 56 mm (D) (Protrusions not included)

Operation environment condition

Operation ambient temperature: 0 to 40 ℃

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1.4. Module configuration

The outline configuration diagram of cecTalker is as follows.

HDMI Control IC

- HDMI2.0-Tx/Rx

- HDCP2.3

-I2S in/out

-2K→4K

up-converter

-4K→2K

down-converter

HDMI-Tx

cecTalker-

MCU

HDMI-Rx 1

HDMI-Rx 2

HDMI-Rx 3

CEC line

UART

interface

USB +5V

Power supply

from AC adapter

HDMI input HDMI output

Communication with host system

cecTalker

LEDs

Reset switch

Selector switch

I2S in

Audio input

I2S out

Audio output

Figure 1: Module configuration diagram of cecTalker

The appearance photographs and component layout diagrams of cecTalker are as follows.

85 mm

56 mm

HDMI-Tx

HDMI-Rx1HDMI-Rx2HDMI-Rx3

HDMI Control

USB MCU

Power

LED

Status

indicator

LED3

Selector

switch

Reset

switch

Status

indicator

LED2

Status

indicator

LED1

Through-hole for UART/Raspberry Pi connection

Front side (Component mounting side)

85 mm

56 mm

Pin header for

SPRESENSE connection

Reverse side

Figure 2: Appearance photograph (left) and component layout diagram (right) of cecTalker

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1.5. Deliverables

The deliverables are as follows:

• CecTalker module

• User manual (this document)

Cables are not included in the deliverables. Prepare cables to be used according to the following information:

• AC adapter: Micro USB type B (+5V@1A*1)

• HDMI cable*2: 4K supported high speed cable (type A)

Notes:

*1: Use the 2A supported product when SPRESENSE is used.

*2: HDMI cable is used to connect the Module with the source/sink (monitor) device. Prepare these cables

according to the number of the source/sink devices.

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2. Details of cecTalker

2.1. HDMI input

The cecTalker module has three input ports for the HDMI 2.0 supported 4K resolution video. The input video can

be switched from these ports. These ports support HDCP 2.3. The video resolution can be converted into 4K only

when input video formats are 2K resolution and progressive scanning. The input video is not converted and is

output as it is when the input video format is the interlaced scanning, 3D video, or video resolution other than 2K.

The supported input video frame rates are 24 fps, 25 fps, 30 fps, 50 fps, and 60 fps. The input audio is output as it

is.

2.2. HDMI output

The cecTalker module can output the HDMI 2.0 supported 4K resolution video. The output port supports HDCP

2.3. The output video frame rate is the same as the input. When the input video is HDCP-free, the output video is

HDCP-free. The output audio format is the same as the input. It is recommended that the 4K (3860x2160)

resolution and progressive scanning supported television or display is used as an output device. The 2K television

or display is available only when the input video resolution is 2K.

2.3. CEC function

The cecTalker module supports the CEC switching function of the HDMI-CEC standard. When the source device

such as the player connected to the Module is powered on or the play button of this device is pushed, the HDMI

input port can be automatically switched to the port connected to the source device by this function. The CEC

function by the command from the UART can control the device connected to the Module. The CEC function is

not available when the CEC command is forbidden by the connected device or CEC is not supported by this

device.

2.4. LED indicator

The cecTalker module has the power on indicator LED (green) and three HDMI input port status indicator LEDs

(red/green). The following table lists the lighting pattern of the status indicator LED.

Table 2: Status indication of LED

Connection status

of input port

Selection status of input port

Lighting pattern of LED

Not connected

Off

Connected

Not selected

Lighting in red

Selected

Preparing HDMI connection

(Connected device is not powered on.)

Blinking in green

Outputting at 4K resolution

Lighting in green

Outputting at resolution other than 4K

Lighting in orange

Output port is not connected (input port status is not related)

or connection error occurs.

Blinking in red

The status indicator LED is lit in green when the 2K resolution video is up-converted into 4K or the 4K resolution

video is output in pass-through. This LED is lit in orange when the video other than the 4K resolution is output. If

the combination of the devices is abnormal even when the output mode is determined, this LED will be off. This

case is met when the video is not displayed in the display device even when the devices are connected without the

Module.

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