MDEV-868-PRC datasheet(19/55 Pages) LINX

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Figure 25 shows the MODE_IND displays in a graphical format.

Using the PB Line

The PB Line is used to trigger functions associated with the Join Process.

This line should be connected to a momentary pushbutton that pulls the

line to VCC when it is pressed and opens the circuit when it is released.

The sequence of presses determines which function is triggered. Figure 26

shows the sequences.

Figure 24: HumPRCTM Series MODE_IND Line Timing

Using the MODE_IND Line

The MODE_IND line is designed to be connected to an LED to provide

visual indication of the module’s status and current actions. The pattern of

blinks indicates the particular feedback from the module. Figure 24 shows

the different blink patterns and their meanings.

HumPRCTM Series Transceiver MODE_IND Line Timing

Display

[on/off time in seconds]

Module Status

Join Operation

Two quick blinks

Administrator Join. The administrator is looking for a node

to join with.

One quick blink

Node Join. The node is looking for an administrator to join

with.

Quick blink

Key Transfer Active. Key transfer is taking place

(administrator and node).

Slow Blink

Key Transfer Complete. The module has completed a key

transfer (administrator and node).

Temporary On

On when the PB line is high

Two quick blinks, one time

Join Canceled.

Slow blink, repeat 3 times

Failure. For Share Key or Get Key, there are multiple

units attempting to pair, protocol error, or timeout without

response

Slow blink and two quick

blinks

Long Hold Acknowledgement. The long hold period for

Generate Key or Reset Sequence was recognized (PB is

asserted)

Key Test Results

One quick blink Three

times

No Key. There is no network key or network address.

Two quick blinks Three

times

Key Set, node. The network key and network address are

set on a node.

Three quick blinks Three

times

Key Set, administrator. The network key and network

address are set on an administrator.

Normal operation

Off

No activity

Temporarily on

Transmitting or receiving packet

Administrator Join

Node Join

Key Transfer Active

Repeats for 30 seconds or until JOIN is complete

Repeats for the duration of the transfer

Key Transfer Complete

JOIN Cancelled

Long Hold

Repeats for as long as the PB line is asserted

after the long hold period has been recognized

Failure

No Key Set

Repeats, three times total

Key Set, Node

Repeats, three times total

Key Set, Administrator

Repeats, three times total

OperationMODE_IND Display

Comments

Six blinks total

0.5

1.5

2.5

Time (seconds)

Figure 25: HumPRCTM Series MODE_IND Displays

HumPRCTM Series Transceiver PB Line Operation

Function

Sequence

Join a network

1 short pulse

Cancel a Join Process that is in progress

1 short pulse

Generate a network key and address

Hold PB high for 30 seconds

Reset to factory defaults

4 short pulses and hold high for 3 seconds

Test key and address

3 short pulses

A short pulse is a logic high that is between 100 and 2,000ms in duration.

Figure 26: HumPRCTM Series PB Line Operation

MDEV-868-PRC Datasheet(PDF) 19 Page - Linx Technologies

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