CIRCUIT DESIGN MU-D1-R Operation Manual
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CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 20 OPERATION GUIDE If you are uncertain about the various settings of the MU-D1-R, return them to the settings at the time the power was turned on. The internal CPU is reset by any of the following. 1. Set the reset (RST) terminal of the MU-D1-R to 1 ms period Low level. 2. Issue the software reset command ‘@SR’. 3. The target station can be reset using an extended command. Return the unit to the
OG_MU-D1-R_v10e Circuit Design, Inc. 47 OPERATION GUIDE 6.7.3 When using only the data line of existing equipment Caution is necessary when using the MU-D1-R connected to existing RS232C equipment. Although RS232C has regulat
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v010e Circuit Design, Inc. 51 OPERATION GUIDE We recommend that you use the dedicated MU-2-R Evaluation You can perform a simple operational check using the Windows accessory HyperTerminal. The following is an explanation of how to use HyperTerminal, and cautions when using the program. Please read the detailed explanation of the commands before starting the evaluation. When
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 17 OPERATION GUIDE The MU-D1-R can be used for building 1:1, 1:N, and N:N systems. Several systems can be operated within the same area by separating the channels used. Equipment IDs from 01h to FEh can be specified, and a maximum of 254 MU-D1-R units can be connected in 1 group. 4.2.1 Communication within a group (1:N and N:N systems) Set the same User ID and Group ID for one
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 34 OPERATION GUIDE Receive response (Source station output) The packet data sent to the target station is returned without change and output as the receive response. • Source station output *DR = 03 ABC C R L F 5.4.5 Receive response When issuing the monitor command, processing is performed at the target station and the result is returned to the source station. This processing result is output from the source station as a data
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 16 OPERATION GUIDE 4.1.4 Conditions for establishing a link A link is established for communications when the following conditions are met simultaneously. 1. There are no errors in the received packet 2. The User ID and Group ID match 3. The Equipment ID specified as the Destination ID and the Equipment ID of the target station match 4. The channel used is the same
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 10 OPERATION GUIDE The frequency channels that the MU-D1-R can use are channels 1 to 20 in the 915 MHz band. To set the channel, use the command format ‘@CH + channel number’. Example: Set channel 15 as the channel to use. Specify the channel following ‘@CH’ with 2 ASCII (hexadecimal) characters. Control command: @CH 0F C R L F Control response: * CH = 0F C R L F
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 8 OPERATION GUIDE The MU-D1-R transmits user data in serial data format using the UART input/output port (TXD terminal and RXD terminal). Level conversion is required for connection to RS232. The RS232C DSR signal must be supported by the user's circuit board. The function of each terminal is shown in
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 5 OPERATION GUIDE Control CPU BPF SAW Filter EEPROM 14 13 9 10 11 12 8 7 6 5 4 3 2 1 MU-D1-R 915MHz Block Diagram DAT (NC) TXL (TX-LED) RXA (RX-LED) TE1 (NC) RST (RESET) INI MOD (MODE) CTS RTS RXD TXD VCC GND RF Chip select Port RXD TXD RESET Port Port Port Ports RXD Port Note SAW: Surface Acoustic Wave /4 Antenna Port Port DVCC for Digital parts Regulator 3.8v for Power AMP RF IC TCXO
OG_MU-D1-R_v10e Circuit Design, Inc. 44 OPERATION GUIDE The MU-D1-R can send data of 255 bytes or less at one time. When transmitting data in excess of 255 bytes, you will need to incorporate a transmission proto
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 27 OPERATION GUIDE 5.4.1.1 @DT Data transmit command 1 The data transmit command 1 ‘@DT’ is a command to transmit data towards the target station set as the Destination ID at the source station. When the source station MU-D1-R receives the command from the user controller, it returns a command response as acknowledgment of receipt of the command. At the same time, it starts wireless data transmission. The target station MU-D1-R outputs the data receive 1 in the �
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 31 OPERATION GUIDE 5.4.2.13 @SN Show serial number Shows the serial number of the MU-D1-R. The serial number is the 9-digit control number shown on the label of the main unit. The response from the MU-D1-R is in ASCII characters. Example: Control command: @SN C R L F Control response: * SN = A12345678 C R L F 5.4.2.14 @SR Reset Returns the MU-D1-R to the statu
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 50 OPERATION GUIDE ◆Time to establish link (when 1 frame is transmitted) tUser = User program processing time tLink = Time to establish link Command time tC = (n + 7) x 10000 / br Radio transmission time tP = (n + 0.2) + 15ms Data receive time tR = (n + 8) x 10000 / br ◆Data transmit command time Data transmit response time tR = 8 x 10000 / br Data transmit command time tC = N x 10000 / br
OG_MU-D1-R_v10e Circuit Design, Inc. 3 OPERATION GUIDE 5.4.2 Control commands and control responses 28 5.4.2.1 @BR UART baud rate setting 28 5.4.2.2 @CH Frequency channel setting 28 5.4
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 49 OPERATION GUIDE ◆CH command & command response timing ◆RA, command & command response timing ◆Command & command response timing when /w option is specified ◆BR command & command response timing
OG_MU-D1-R_v10e Circuit Design, Inc. 4 OPERATION GUIDE The MU-D1-R is an FCC part15 compliant embedded low power radio modem for transmission of serial data. Since it is possible to control the radio component using dedicat
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 40 OPERATION GUIDE 6.4.1 Responses and receives Responses and receives are returned by the MU-D1-R in the following cases. 1. When a command is issued (command response, error response) 2. Processing result from the target station corresponding to the issued command (receive reponse) 3. When data from the source station is received (data receive) 6.4.2 Response and receive formats All responses and receives start with the pre
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 42 OPERATION GUIDE
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 37 OPERATION GUIDE 1. The radio transmission rate of the MU-D1-R is fixed at 600 kbps (40 x 15 chips). Note that this is different from the rate of the UART (RS232C) interface. In addition, to achieve communication, besides the user data, data consists of a frame structure with a preamble, control data, error checking data and so on added. For this reason the effective rate for radio transmission is 30.1 kbps. 2. RTS and CTS hardware flow control is used for the serial interface of the MU-D1-R
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 43 OPERATION GUIDE With applications that use the MU-D1-R, in the development stage or when development is complete and the unit is actually used, it is necessary to assess the field status of the system at all times for stable communication. In other words, in the development stage when the MU-D1-R is mounted on the circuit board, it is necessary to consider the pattern design and arrangement of components to extract the optimum values for radio perf
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 36 OPERATION GUIDE Control of the MU-D1-R is performed by issuing commands and processing the subsequent response (including the data receive at the target station). The MU-D1-R has 3 modes, however the only mode required for making practical applications is the command mode. This chapter explains the items necessary for developing a user program, focusing on the command mode. The pu
OG_MU-D1-R_v10e Circuit Design, Inc. 19 OPERATION GUIDE 4.3.4 Mode setting When the MODE terminal is at High level The MU-D1-R is set to the command mode irrespective of the setting in the mode register. Th
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v010e Circuit Design, Inc. 53 Important notice • Customers are advised to consult with Circuit Design sales representatives before ordering. Circuit Design believes the provided information is accurate and reliable. However, Circuit Design reserves the right to make changes to this product without notice. • Circuit Design products are neither designed nor intended for use in life support applicati
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 41 OPERATION GUIDE 6.4.4 Response and receive processing First, the response and receive data that enters UART from the MU-D1-R is received by the ring buffer. If there is data in the ring buffer, the response and receive identification routine takes 1 byte at a time and performs interpretation of the response and the receive. After, the processing routines diverge in accordance with each response or receive. To determine the response and receive type, prepare a
CIRCUIT DESIGN MU-D1-R, OG_MU-D1-R_v10e Circuit Design, Inc. 7 OPERATION GUIDE 2.1.1 General specifications Temperature conditions: +25ºC ± 5ºC, typical Item Specification (Typ.) Remarks Compatible standards FCC part15.247 Emission class G1D Antenna power (selectable) 40 mW (PA ON) 8 mW (PA OFF) +5ºC to +35ºC Contact (50 Ω) Selectable by the command Frequency stability Within ± 4 ppm Reference freq. at 25ºC Antenna 1/4λ wire antenna Gain of 2.14 dBi or less Communicat
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