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PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Book 33

Drive Out

SERVICE~ Pin

Signal Out

Firmware

Samples

For driving a 50% duty cycle output.

Waveform is sampled for external ground condition.

20 mA

Sink

Broadcast

Config

Pull-Up

LED

SERVICE~

Three-

State

Low Low Low

Three-

State

Three-

State

PL 3120/3150 Smart Transceiver

Figure 2.11 PL Smart Transceiver SERVICE~ Circuit

Table 2.10 Service LED Behavior During Different States

Device State

0xF015

State Code Service LED

Applicationless and Unconfigured 3 On

Unconfigured (but with an Application) 2 Flashing

Configured, Hard Offline 6 Off

Configured 4 Off

PL 3150 Defective External Memory — On

The SERVICE~ pin is active low and the service pin message is sent at most once per SERVICE~ pin transition. The

service pin message goes into the next available priority or non-priority output network buffer. Devices in the

applicationless state that do not have an external pullup will transmit the SERVICE~ pin message after every reset.

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Elta LE100 Especificações Página 40