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RAK5804 WisBlock Interface Extension Module Datasheet

Overview

Description

RAK5804 WisBlock Interface Extension Module was designed to be part of a production-ready IoT solution in a modular way and must be combined with a WisBlock Core and a Base module.

This module is designed as an IO extension module that allows you to connect your digital or analog devices or sensors to create a customized IoT solution. These sensors are connected through two expansion connectors: J2 and J3. In order to provide power to peripheral devices, 3.3 V can be obtained from these expansion connectors. Internal protections allow to shut down the power supply when a short circuit is detected in the peripheral devices. Overcurrent cases are protected through internal PTC thermistors in the power supply circuit.

In addition, the RAK5804 module also supports a USB interface, which can be used with RAK5005-O to access the USB port of MCU of the WisBlock Core module of the solution.

All external expansion interfaces of the RAK5804 module are equipped with TVS protection circuit to avoid damaging the mainboard and WisBlock Core circuit with ESD when users plug in or unplug to the expansion interfaces.

Features

  • IO connector
  • Supports two (2) pieces of 10-pin IO extension connectors
  • Supports one (1) USB connector to access WisBlock Core Module
  • TVS protected circuity
  • PTC thermistor to prevent output power overload
  • Dimension: 25 mm x 15 mm

Specifications

Overview

The RAK5804 module can be mounted on the IO slot of the WisBlock Base board. Figure 1 shows the mounting mechanism of the RAK5804 on a WisBlock Base module, such as a RAK5005-O.

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Figure 1: RAK5804 mounting mechanism on a WisBlock Base module

Hardware

The hardware specification is categorized into four parts. It discusses the interfacing, pinouts and its corresponding functions and diagrams of the module. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK5804 WisBlock™ Module.

Interfaces

The RAK5804 module exposes the IO pins, the I2C, and the UART communication ports through the J2, J3, and J4 connectors. Users can use these ports to connect sensors, digital I/O, analog I/O, and slave devices. These ports are routed to the WisBlock Core through the IO connector.

NOTE

The J2 and J3 connectors use a JST SH Connector.

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Figure 1: RAK5804 J2, J3, and J4 I/O connectors
J2 Connector
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Figure 1: RAK5804 J2 Connector
Pin NumberFunction Description
1VBAT, Battery Power Supply
23.3 V
3GND
4I2C1_SCL
5I2C1_SDA
6IO1, GPIO1
7IO3, GPIO3
8UART1_RX
9UART1_TX
10IO4, GPIO4
J3 Connector
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Figure 1: RAK5804 J3 Connector
Pin NumberFunction Description
1VBAT, Battery Power Supply
23.3 V
3GND
4LED1
5LED2
6AIN1, ADC Input
7IO2, GPIO2
8SW1
9I2C2_SCL
10I2C2_SDA
J4 Connector
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Figure 1: RAK5804 J4 USB connector
PinDescription
1USB_VBUS (+5 V)
2USB_DM
3USB_DP
4NC
5GND

Pin Definition

The RAK5804 module comprises a standard WisBlock Interface connector. This IO connector allows the RAK5804 module to be mounted on a WisBlock baseboard, such as the RAK5005-O. The pin order of the connector is shown in Figure 6.

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Figure 1: RAK5804 WisBlock Interface connector
Pin NumberDescriptionPin NumberDescription
1Battery Power2Battery Power
3GND4GND
53V3 Power6NC, Power Reserved for 3.3 V
7USB+8USB–
9VBUS10SW1
11NC12NC
13NC14LED1
15LED216NC
17NC18NC
19SDA for I2C120SCL for I2C1
21NC22Analog1 to MCU
23NC24NC
25NC26NC
27NC28NC
29IO130IO2
31IO332IO4
33TXD134RXD1
35SDA for I2C236SCL for I2C2
37NC38NC
39GND40GND

Electrical Characteristics

This section shows the maximum and minimum ratings of the RAK5804 module and its recommended operating conditions. Refer to the tables presented below.

Absolute Maximum Ratings
SymbolDescriptionMinimumNominalMaximumUnit
VBATPower Supply for the Module–0.54.2V
3V33.3 V Power Supply–0.53.6V
IfusePTC Protection Current500mA
TEMPWorking Temperature–3065°C
StorageStorage Temperature–4085°C
Recommended Operating Conditions
SymbolDescriptionMinimumNominalMaximumUnit
VBATPower Supply for the module2.64.2V
3V33.3V Power Supply3.03.33.6V

Mechanical Characteristics

Board Dimensions

The mechanical dimensions of the RAK5804 module are shown in Figure 7.

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Figure 1: RAK5804 Mechanical Dimensions
WisConnector PCB Layout
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Figure 1: WisConnector PCB footprint and recommendations

Schematic Diagram

Figure 9 shows the schematic diagram of the RAK5804 WisBlock Interface connector, USB connector, and the 10 mechanical holes.

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Figure 1: RAK5804 Schematic Diagram