Data may be changed without notice - Proprietary information of Yamar Electronics Ltd.

©2019-2022 Yamar Electronics Ltd.

14

DS-DMX250 R 0.80

www.yamar.com

Tel: +972-3-5445294 Fax: +972-3-5445279

4.

Power operation modes

The DMX250 has three power operation modes; Normal, Standby, and Sleep.

4.1

Normal mode

In Normal mode, the DMX250 is either in RX mode, listening for a powerline message, or in TX mode, transmitting

a message over the powerline.

4.2

Standby mode

The DMX250 enters Standby mode upon wake-up from Sleep mode, while the NSLEEP pin is still low. The DMX250

is kept in Soft-reset, whereas communication with the DMX-controller is suspended until the NSLEEP pin is set

High.

4.3

Sleep modes (power-saving)

The DMX250 has four Sleep modes for best power consumption/performance during Sleep. During this mode, only

a small amount of hardware is operational mainly to detect wake-up messages (WUM) from the powerline and

returning to Normal mode operation.

Table 8 describes the DMX250 sleep modes.

Table 8 - Sleep modes description

Sleep mode

Description

Typical Power

consumption [A]

Performance

Enhanced sleep

(SLP1)

The device wakes-up every 32ms to

sense the powerline for WUM detection.

120µ

Wake-up detection with-in

64mSec. Best detection in a

noisy environment.

Fast wake-up

(SLP2)

The device continuously monitors the

powerline for WUM detection.

1000µ

Fast wake-up detection with-

in 250uSec.

Low-power

(SLP3)

The device wakes-up every 32ms to

sense the powerline for WUM detection.

85µ

Wake-up Detection with-in

64mSec.

Deep Sleep

(SLP4)

The device does NOT wake-up to sense

for bus activity, staying in deep sleep.

Wake-up only locally by the DMX-

controller.

65µ

No bus wake-up detection.

The Sleep modes use four interface pins as described in Table 9.

Table 9- Sleep interface pins

NSLEEP

Digital

input

High - Normal mode is active.

Low - Sleep /Standby mode is active.

INH

Digital

output

Output indication to Inhibit DMX-controller.

High - Normal mode is active.

Low - Sleep mode is active.

HDO

Digital

output

Normal mode - data output to DMX-controller.

Sleep/Standby

mode

- asserted

low

while

the

wake-up

message

is

being

detected/transmitted over the powerline.

HDC

Digital

input

Normal mode - DMX-controller Command mode / chip select.

Sleep mode - DMX-controller wakes-up the DMX250 locally by toggling the HDC high-low-

high. The DMX250 then exits the Sleep mode to Standby mode (NSLEEP still asserted low),

or Normal mode (NSLEEP is high).

4.3.1

Wake-up message (WUM)

When Auto-WUM is enabled (REG[3]='1'), upon the rise of the NSLEEP pin, the DMX250 transmits a broadcast

WUM over the powerline, to wake-up all network-connected devices.

DMX-controller can configure the length of the WUM as described in Table 10.