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OG_MU4-USBIF_v10e                                                            12                                                            Circuit  Design,  Inc. 

OPERATION GUIDE 

 

 
When embedding theMU4-USB (MU-4 + MU4-USBIF) in a user system, pay due attention to the design of the board 
and case. 
 

 
This board is connected to a PC provided with a USB port. Connect the unit to the PC with the dedicated USB cable 
provided. Power for the product is supplied from the PC through the USB cable. 
If you house the product in a case, determine the position of the ground and antenna through a variety of tests. 
In addition, if you attach LEDs to the case, connect them with inch-pitch through holes with reference to the diagram 
below. 
If you use a USB cable other than the one provided, use a double shield cable (USB 2.0 High Speed). Otherwise, 
radio waves may not be emitted due to high frequency noise from the USB.   
When using USB, pay attention to the total current capacity of the other equipment since it can result in malfunctions. 
When marketing products that use this product, provide information about the current in your operation guide. 
 
 

 4.1.1 Controlling the MU4-USB with a PC 

 

MU-4

U

S

B

 

c

ab

le

User 

PC

λ

/4 lead antenna *2

1

2

3

4

5

6

7

8

Power LED

Tx LED

Rx LED

RSSI

GND

GND

+3v

+3v

*

*

*

*

To the

processing circuit

100pF

100pF

MU4-USB

Inch pitch through holes only.
If necessary, mount an 8-pin
socket, and attach external LEDs
etc.

USB-B 

receptacle

100pF

Connecting external LEDs

To prevent noise, attach a ceramic

capacitor of about 100 pF to the LED.

Terminals 1, 3, and 5 there are 1k

Ω

resistors in the MU4-USB.

*1: Solder the terminal lug etc. and connect it to the user case
ground. Determine the connection point with various tests.

*2: If the antenna is bent to fit inside, the communication 
range falls and communication errors become frequent. Do 
Not put the antenna inside a metal case.

 

4.1 Embedding the Product

 

Chapter 4 How to Design a User System

 

Содержание MU4-USBIF

Страница 1: ...dem MU 4 MU 4 USB Interface Board MU4 USBIF Operation Guide Version 1 0 Sep 2020 CIRCUIT DESIGN INC 7557 1 Hotaka Hotaka machi Minamiazumi Nagano 399 8303 JAPAN Tel 81 0 263 82 1024 Fax 81 0 263 82 10...

Страница 2: ...ble 7 2 5 External Dimensions 8 2 6 Circuit Diagram 9 Chapter 3 How to Use the MU4 USB 10 3 1 System Configuration Example 10 3 2 The USB driver 11 3 3 Resetting 11 3 4 Initializing 11 Chapter 4 How t...

Страница 3: ...r installation refer to the information on installing the driver found in the setup launcher in the zip file 1 1 1 The MU4 USB In this operation guide for the sake of convenience the MU 4 USB interfac...

Страница 4: ...g user systems are publicly available The product can be embedded in a case and can be used for making products for radio control from a PC Compact size 47 78 16 mm fits in a small housing Features of...

Страница 5: ...tents are as follows First please check that you have all the items 1 4 1 Accessories 1 USB interface board MU1 USBIF 1 2 Conversion board 1 3 Spacers used as legs 10 mm 4 4 Screws for spacers M2 6 6...

Страница 6: ...the power connect the USB cable while pressing the initialize button 2 Release the initialize button and after turning off the power remove the USB cable turn the power again connect the USB cable aft...

Страница 7: ...3v Tx LED Rx LED SW2 USB Controller EEPROM VCC 1 2 3 4 5 6 7 8 3v 3v 3v Power LED Power LED Tx LED Rx LED RSSI GND GND 3v 3v Vbus 1 USB B Receptacle D 2 D 3 GND 4 3v MU 4 2 4 5 6 7 1 8 9 12 11 10 13...

Страница 8: ...nnector Not including the antenna Unit weight 26 g 2 3 2 USB interface specifications 2 3 3 RS232C parameter specifications Data speed 1 200 2 400 4 800 9 600 19 200 38 400 57 600 bps Flow control RTS...

Страница 9: ...USBIF_v10e 8 Circuit Design Inc OPERATION GUIDE 75 71 5 14 5 40 47 12 05 1 4 3 12 4 2 5 10 9 180 4 3 0 4 lead antenna RF GND VCC RXD CTS INI RXM DO RXL TXD RTS MOD RST DI TXL MU 4 434 2 5 External Dim...

Страница 10: ...e around the USB chip and from the interface 1 Exercise caution in placement of the MU 4 and USB chip In addition there are cases where shielding is necessary around the chip 2 Add a noise filter to t...

Страница 11: ...U 4 refer to Chapter 4 How to Use the MU 4 in the MU 4 operation guide UI 0055 GI 02 EI 01 UI 0055 GI 02 EI 02 UI 0055 GI 02 EI 03 UI 0055 GI 02 EI 04 MU2 USB MU4 USB Note UI User ID GI Group ID EI Eq...

Страница 12: ...iver 3 2 3 Checking that the USB Driver Works To check that the USB driver works use the Device Manager Check that MU2 USB appears in the Properties Using the reset command SR the MU4 USB can be reset...

Страница 13: ...tion to the total current capacity of the other equipment since it can result in malfunctions When marketing products that use this product provide information about the current in your operation guid...

Страница 14: ...inclining the whip antenna of the MU 4 forwards may increase its communication range Carry out tests in the specific environment of use The MU4 USBIF is a test board that uses an USB interface to inte...

Страница 15: ...ire the RSSI level of the MU 4 and check the level It is necessary to acquire and assess the level of all the channels Set a standard lower than the value acquired with the MU4 USB Here it is convenie...

Страница 16: ...port inf FtdiHw VID_0403 PID_6001 DeviceDesc FtdiPort232 NT FTDIBUS COMPORT VID_0403 PID_6001 VID_0403 PID_6010 DeviceDesc FtdiPort2232 NT FTDIBUS COMPORT VID_0403 PID_6010 Add VID_1234 PID_5678 Devic...

Страница 17: ...cuits and reverse connections may result in overheating and damage and must be avoided at all costs Ensure that the power supply has been switched off before attempting any wiring work The case is con...

Страница 18: ...OG_MU4 USBIF_v10e 17 Circuit Design Inc OPERATION GUIDE REVISION HISTORY Version Date Description Remark 1 0 Sep 2020 MU4 USBIF The first issue...

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