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DS-DMX250 R 0.80

www.yamar.com

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4.3.4.2

Fast wake-up Sleep mode (SLP2)

By setting REG_3[1:0] = '01', the Fast wake-up Sleep mode (SLP2) is selected. The device continuously monitors the

powerline for WUM detection. It allows fast WUM detection within 250usec. When WUM is detected, the device

exits Sleep mode as described in section ‎4.3.3.1.

4.3.4.3

Low-power Sleep mode (SLP3)

By setting REG_3[1:0] = '10', the low-power mode (SLP3) is selected. The device wakes-up every 32msec

periodically to monitor (sense period) for activity on the powerline. If a WUM is detected, the device exit Sleep

modes as described in section ‎4.3.3.1, otherwise the device return to Sleep mode until the next sense period.

4.3.4.4

Deep Sleep mode (SLP4)

By setting REG_3[1:0] = '11', the Deep Sleep mode (SLP4) is selected. The device will NOT wake-up to monitor

(sense) the powerline for activity, rather than stay in deep sleep, whereas all its analog resources are shut down to

maintain the lowest power consumption.

The device can exit Deep Sleep mode locally only, either by the NSLEEP or by HDC pins (see ‎4.3.3.2 and ‎4.3.3.3).

4.3.5

Sleep modes Examples

4.3.5.1

Sleep Example 1 - Enter by NSLEEP, Exit Sleep mode by NSLEEP & WUM

Figure 16 depicts entering sleep by NSLEEP and exit sleep by NSLEEP pin (Node A) and WUM detection (Node B).

In this example, the DMX-controller wakes-up device Node A by raising the NSLEEP pin. Upon pull-up of the

NSLEEP pin, the INH pin is raised and a WUM is transmitted over the powerline (Auto-WUM is enabled) to wake-up

Node B.

While transmitting the WUM, device Node A asserts HDO pin low. After completion of WUM transmission, the

HDO is raised again (can be used as signal/interrupt to DMX-controller). At the Node B side, during its sensing

period (e.g. SLP1), the WUM is detected, and the INH rises while switching to Standby mode. Node B HDO pin is

asserted low for the reaming duration of WUM reception. Then, DMX-controller Node B raises the NSLEEP pin, and

the device switches to Normal mode.

Figure 16 - Enter sleep by NSLEEP, Exit sleep by NSLEEP & WUM

4.3.5.1

Sleep Example 2 - Enter sleep by control register bit, exit sleep by HDC

Figure 17 depicts entering sleep by setting REG_3[7] high and exiting Sleep mode by toggling the HDC pin.

In this example, DMX-controller configured REG_3[7] high using Command mode (DMX interface), the device

enters Sleep mode, and INH pin drops. After a while, DMX-controller toggle HDC pin low to high, and the device

exits Sleep mode without transmitting the WUM, raising the INH pin and switching to Normal mode again.