Legacy Converter Datasheet Sample Part Number: LTW4455-RFM-00-000 MP Part Number: LTW4455-RFM-01-000 1
Revision History Revision Date description V0.1 Sep 14, 2018 1st Working Sample V1.
TABLE OF CONTENTS 1. Features --------------------------------------------------------------------------------- 4 2. Part Number ---------------------------------------------------------------------------- 5 3. Label Information ----------------------------------------------------------------------- 5 4. Electrical Characteristics ---------------------------------------------------------------- 6 5. Power Sequences ----------------------------------------------------------------------- 6 6.
1. Features Interfaces : UART1, USART1(UART or SPI) Main ICs : A31G112KU(32QFN-0505), SX1276, PD84006L Reference Clocks : Intergrated 26MHz clock(TCXO with frequency error=±2ppm) Model Name : J1901 (Legacy Converter) Manufacture : LEETEK co., Ltd Channel Spacing : 12.5KHz Frequency stability : ±2ppm Spurious Rejection : -40dBm below Modulation : GFSK Data Rate : 512bps, 1.
2. Part Number Ordering Part Number Description LTW4455-RFM-00-01 Engineering sample LTW4455-RFM-01-01 MP P/N 3.
4. Electrical Characteristics 7.1 FSK Transceiver Specification Conditions: VDD=12V, 25 ℃, FXOSC=26MHz, GFSK, FDA=4.5KHz, Bit Rate=1.2Kbps, and terminated in a matched 50 Ohm impedance, shared Rx and Tx path matching, unless otherwise specified. FSK Receiver Specification Symbol Description Conditions RFS_F_LF LnaBoost is FDA=4.5KHz, turned on BR=1.2Kbps CCR Min. Co-Channel Typ Max Unit -122 dBm -9 dB Rejection, FSK ACR BI Adjacent Channel FDA=4.5KHz, dB Rejection BR=1.
FSK Transmitter High power Specification Symbol Description Conditions Min. Typ Max Unit RF_OPH RF output power Programmable with +25 - +34 dBm high in 50 ohms. steps(2dB step). RF power_ From T=-20℃~+60℃ ΔRF_T ±2 dB Temperature ACP Adjacent channel EN 300 224 60 - - dB 0.3 0.5 1 A power IDDT_2 Supply current in Transmitter mode. 5. Power Sequences 5.1 Power Up Sequence VDD Data(I/O) 5.
6 PB5/RXD0/SWDIO I/O General I/O, UART0-RX, Debug port, Ext Interrupt 7 PB6/TXD1 I/O General I/O, UART1-TX, Ext Interrupt 8 PB7/RXD1 I/O General I/O, UART1-RX, Ext Interrupt 9 GND Power Ground supply terminal 10 nRESET Input Active-low device Reset input 11 PB0/AN8/TXD10/MOSI10 I/O General I/O, UART10-TX, MOSI10, Boot mode, ADC, Ext Interrupt 12 PB1/AN9/RXD10/MISO10 I/O General I/O, UART10-RX, MISO10, Boot mode ADC, Ext Interrupt 13 PB2/AN10/SCK10 I/O General I/O, SCK10, Boot
8. BOOT MODE(download firmware). 8-1. Boot Mode Pins The Module has a boot mode to program the internal flash memory. Boot mode will be activated by setting BOOT pin to “Low” level at reset timing. (Normal operation mode is “High” level) Boot mode supports either UART boot or SPI boot. UART booting uses the TXD10/RXD10 ports, and SPI booting uses the MOSI10/MISO10/SCK10/SS10 ports. The following pins are used in boot mode.
< Connection diagram of UART Boot > < Connection diagram of SPI Boot > 8-3.
9. UART Communication Protocol and Data Format a. Baud Rate : 19200 bps b. Data Bits : 8 c. Parity Bit : None d. Stop bit : 1 9-1. Protocol and Data Format for Numeric Paging [Function] 01 : Non Priority Alert for Numeric Pagers. 02 : Priority Alert for Numeric Pagers. 03 : Non Priority Alert for Alphanumeric Pagers. 04 : Priority Alert for Alphaumeric Pagers.
9-3. Protocol and Data Format for Module Configuration [Function] 01 : Non Priority Alert for Numeric Pagers. 02 : Priority Alert for Numeric Pagers. 03 : Non Priority Alert for AlphaNumeric Pagers. 04 : Priority Alert for AlphaNumeric Pagers. Separator Separator END 05 : Configuration.
[Function] 01 : Non Priority Alert for Numeric Pager 02 : Priority Alert for Numeric Pager 03 : Non Priority Alert for Alphanumeric Pager 04 : Priority Alert for Alphanumeric Pager 05 : Configuration 1 (Base ID, Baud Rate, Freuqncy, etc) 06 : Configuration 2 (RX, Repeater On/Off) 07 : Data Read HEX 1 2 3 4 5 FF FF FF 07 0D [ BEL] [ CR] ASCII CODE START (Preamble) Separator 1 2 3 4 5 6 7 8 9 10 11 12 13 HEX 07 30 37 30 03 30 30 30 31 32 30 30 03 ASCII CODE [ BEL]
10. AT Command a. Baud Rate : 19200 bps b. Data Bits : 8 c. Parity Bit : None d.
11. Notice. 11.1 Storage Conditions Please use this product within 6month after receipt. - The product left more than 6months after reception, it needs to be confirmed the solderbility before used. - The product shall be stored in non corrosive gas (Cl2, NH3, SO2, Nox, etc.). - Baking condition: 125 +5/-0 °C, 24 hours, 1 time 11.2 Handling Conditions Be careful in handling or transporting products because excessive stress or mechanical shock may break products.
11.6 Operational Environment Conditions : Products are designed to work for electronic products under normal environmental conditions (ambient temperature, humidity and pressure). Therefore, products have no problems to be used under the similar conditions to the above-mentioned. However, if products are used under the following circumstances, it may damage products and leakage of electricity and abnormal temperature may occur. - In an atmosphere containing corrosive gas ( Cl2, NH3, SOx, NOx etc.).
the condition and in the environment specified in this specification. You are requested not to use our product deviating from the condition and the environment specified in this specification. Please note that the only warranty that we provide regarding the products is its conformance to the specifications provided herein.
We expressly prohibit you from analyzing, breaking, Reverse-Engineering, remodeling altering, and reproducing our product. Our product cannot be used for the product which is prohibited from being manufactured, used, and sold by the regulations and laws in the world.
approval sheet, it shall be deemed to be your consent on the content of specification sheet or approval sheet. Customer acknowledges that engineering samples may deviate from specifications and may contain defects due to their development status. We reject any liability or product warranty for engineering samples.
as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. FCC Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
IC Radiation Exposure Statement This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USER’S AUTHORITY TO OPERATE THE EQUIPMENT. End Product Labeling The module is labeled with its own FCC ID and IC Certification Number.
interférence nuisible et (2) cet appareil doit accepter toutes les interférences reçues, y compris celles qui pourraient provoquer un fonctionnement non souhaitable. Cet appareil et son antenne ne doivent pas être placés à proximité de toute autre antenne ou de tout autre émetteur, ni être utilisés conjointement avec ceux-ci.
