Wavecom G2 Guide de l'utilisateur télécharger pdf (Page 41)

CM52 Integrators’ Manual

WI_DEV_CM52_UGD_001-001

Page 41 of 53

CM52 Integrators’ Manual

Shut down sequence

1. To request a shutdown of the phone module, the application should provide an active low

pulse of 100 ± 25 ms on the HW_SD pin through an open collector output.

2. This pulse is detected by the Wireless CPU

, which confirms the request by enabling its

HW_SD output, setting it active low.

3. The application waits for the HW_SD pin to become inactive high.

4. The Wireless CPU

has performed its power down sequence and disables its output

resulting in HW_SD becoming inactive high.

5. The application shuts down, disabling MODULE_PWR_EN_B.

HW_SD

Shutdown

Request

Shutdown

Confirm

1423

MODULE_

PWR_EN_B

Figure 22: Shut Down Sequence Timeline

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable

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Wavecom G2 Guide de l'utilisateur Page 41