Command

entering

period

Blank

period

CTRL

LED

To Standby

Command

entering

period

Blank

period

Programmed

sequence

CTRL

LED

To Standby

10

LP5560

SNVS873D – AUGUST 2012 – REVISED JUNE 2016

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7.3.2.1 Run Command

One rising edge of the CTRL signal within command entering period is interpreted as a run command. The CTRL

pin must be kept high during blank period. If the CTRL pin is pulled low during command entering period or blank

period device goes to stand by. In run mode (mode bit = 1) blinking sequence is started right after Blank period

and it is repeated as long as CTRL signal is kept high. When the CTRL signal is set low device goes into standby

mode (Figure 9).

Figure 9. Run Mode

In follow mode (mode bit = 0) LED is turned on right after a blank period, and it stays on as long as CTRL is kept

high. When CTRL signal is set low LED is turned off and device goes into standby mode (Figure 10).

Figure 10. Follow Mode

7.3.2.2 Training Start Command

Two rising edges of CTRL signal within command entering period is interpreted as training start command.

Training start command starts training sequence. Different blinking sequences can be trained into device in

training mode. Training mode is described in more details in Training Mode.

7.3.2.3 Training End Command

Three rising edges of CTRL signal within command entering period is interpreted as training end command.

Training end is used to stop the training sequence.

7.3.2.4 Run-Once Command

Four rising edges of the CTRL signal within command entering period is interpreted as a run-once command.

Programmed blinking sequence is performed once after a run-once command. If CTRL is kept high after

command entering period the programmed blinking sequence starts right after the blank period has elapsed

(Figure 11). The CTRL signal must stay high as long as programmed blinking sequence is executed. If CTRL is

set low during execution of blinking sequence, device goes to standby and execution of blinking sequence is

stopped.