SHENZHEN HI-LINK ELECTRONIC CO.,LTD HLK-RM08S USER MANUAL Version：V1.
CONTENTS 1. BRIEF INTRODUCTION............................................................................................................................................ 1 1.1. BASIC PARAMETERS.................................................................................................................................... 1 2. BLOCK DIAGRAM...................................................................................................................................................... 2 2.1.
HLK-RM08S 1. Brief Introduction HLK-RM08S based on MT7688KN is a low cost and low power consumption IOT module developed by Hi-Link.The module has rich interfaces and powerful processor and could be widely used in smart devices and cloud service applications. 1.1. Basic parameters High data processing ability，MCU frequency 580MHz 150M Mbps Support 802.11b/g/n mode 20/40 channel bandwidth Support 802.
HLK-RM08S 2. Block diagram Ethernet UART 3.
HLK-RM08S 2.1.
HLK-RM08S 2.2. Specification Item Parameter Model HLK-RM08S Main Chip MT7688KN I-Cache，D-Cache 64KB,32KB Kernel MIPS24KEc Main frequency 580MHz RAM 64Mb Flash 32Mb RF 1T1R 802.11n 2.4GHz USB2.0 1 UART 2 Temperature Environmental temperature：-40℃~85℃ working：10~95%（noncondensing） Humidity Storage：5~95%（noncondensing） Size 17.4mm×25.8mm×2.8mm 3. Electrical characteristics 3.1.
HLK-RM08S 3.2. RF Characteristics 3.2.1. 802.11b 11M 802.11b Transmit (Conductive) Item Condition Frequency Range Min. Typ. Channel 1 Tx Power Level DQPSK Frequency Tolerance Max. Unit Channel 13 18 20 22 dBm -15 0 15 ppm 11MHz→22MHz 40 dBr ＞22MHz 53 dBr All Data Rate 15 % Spectral Mask Modulation Accuracy 802.11b Receiver (Conductive) Item Condition Frequency Range Min. Input 3.2.2. Min. Typ. Channel 1 11Mbps PER<8% -91.5 Max. Unit Channel 13 -89.5 -87.
HLK-RM08S 3.2.3. 802.11n MCS7(HT20) 802.11n_HT20 Transmit (Conductive) Item Condition Frequency Range Tx Power Level Typ. Channel 1 OFDM Frequency Tolerance Modulation Accuracy Min. Max. Unit Channel 13 15 17 19 dBm -15 0 15 ppm -31 -28 dB Max. Unit All Data Rate 802.11n_HT20 Receiver (Conductive) Item Condition Frequency Range Min. Input 3.2.4. Min. Typ. Channel 1 MCS7 PER<10% -76.5 Channel 13 -74.5 -72.5 dBm Max. Unit 802.11n_MCS7(HT40) 802.
HLK-RM08S 4. PINS DEFINTION 4.1.
HLK-RM08S 4.2.
HLK-RM08S 27 MDI_RN_P3 SD_D0 eMMC_D0 GPIO25 28 MDI_RP_P4 SD_CLK eMMC_CLK GPIO26 29 MDI_RN_P4 SD_CMD eMMC_CMD GPIO28 30 MDI_TP_P4 SD_D3 eMMC_D3 GPIO29 31 MDI_TN_P4 SD_D2 eMMC_D2 GPIO27 32 USB_DP Default not available 33 USB_DM Default not available 34 EPHY_LED4_N JTAG_RST_N GPIO30 Com 4 status led 35 EPHY_LED2 JTAG_TMS GPIO32 Com 2 status led 36 EPHY_LED0 JTAG_TDO GPIO34 Com 0 status led 37 GND 38 GND 39 3.
HLK-RM08S Notes： 1，All pins default 1 2，IO drive current is 4mA 3，All TTL is 3.3V 5. Dimensions HLK-RM08S Drawing Introductions： 1，The size of the module is length 1mm,width 1mm,space 1.4mm , depth 1.8mm. 2，The thickness of the module is 1.8mm. 3, The noted numbers in the picture is the actual size of module,do recommended pad extension around 1mm, internal heat shrink 0.2mm pad, internal thermal pad grounding once do encapsulation.
FCC Warning This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
Note 6: FCC ID label on the final system must be labeled with “Contains FCC ID: 2AD56HLK-RM08S” or “Contains transmitter module FCC ID: 2AD56HLK-RM08S”.
