- AD VA NCE D IN F O RMA T IO N -

LTP5903-WHR Datasheet

Dust Networks

9

7.1.1

10/100Base-T Ethernet Interface

Ideal for remote or high-bandwidth access, the Ethernet interface provides full configuration management and data access to

the LTP5903-WHR. The port connects to an IEEE 802.3 standard 10/100Base-T PHY, accessible through the board-to-board

J10 connector. An appropriate Ethernet design requires magnetics and an RJ-45 connector.

RX_P and RX_N are the receive-side differential pair (see section 8.2 for pinout). The Rx and Tx levels conform to

10/100Base-T Ethernet.

7.1.2

Serial 1 Interface

The Serial 1 interface is designed for embedded integration with controllers. This serial interface provides programmatic

access for configuration, management, and data access to the LTP5903-WHR. The port is a 5-pin LVTTL (3.3 V) serial

interface accessible through the board-to-board J10 connector.

Table 16 Serial 1 Parameters

Parameter

Value

Bit rate

115200

Parity

N

Data bits

8

Stop bit

1

Flow control

None

7.1.3

Serial 2 Interface

The LTP5903-WHR provides a UART interface with TX, RX, RTS, and CTS lines through the board-to-board J6 connector,

operating up to 115 kbps.

Table 17 Serial 2 Parameters

Parameter

Value

Bit rate

115200

Parity

N

Data bits

8

Stop bit

1

Flow control

None

7.1.4

LED Status Indicators

The LTP5903-WHR has LED status indicators on the top surface of the module, whose signals also pass through the board-

to-board J10 connector.

Table 18 LED Status Indicators

LED Name

Signal Name

Description

Color

Power

Indicates 3.3V DC-DC converter is okay, lights when 5 V supply is

connected

Green

RST

¯¯¯

nRESET_IN

Indicates the manager is in the reset state

Red

7.1.5

Restore Signal

The LTP5903-WHR supports the ability to restore its configuration settings to the Dust factory defaults. This feature is most

useful in non-embedded applications where the LTP5903-WHR configuration may be different per installation (for example,

a manager’s IP setting is forgotten and therefore unreachable). Note that while the restore feature may be used to recover a

previously “unreachable” manager, all customizations to the manager will be lost, including configuration, logs, OTAP

directory files, and persistent mote information.