User guide

CM52 Integrators’ Manual
WI_DEV_CM52_UGD_001-001
Page 40 of 53
CM52 Integrators’ Manual
3.1.3 RI
This signal, located on pin 40 in the system connector, provides the application with notification of
an incoming call or SMS. Please refer to the CM52 Software User’s Guide and AT Command Manual
for more details about what events can toggle this signal.
It takes approximately three seconds for the Wireless CPU
®
to be ready to receive data after it is
powered ON by pulling the MODULE_PWR_EN_B signal low. The application should not rely on the
ring indicator signal at power up, until the ‘Restart’ message is received via the RD signal.
3.1.4 HW_SD
This signal, located on pin 15 in the system connector, provides the ability to perform a hardware
shutdown of the Wireless CPU
®
. It is a bi-directional signal that is pulled up inside the phone
module.
Shutdown
Indicate
Shutdown
Request
Shutdown
Confirm
Shutdown
Detect
VREF
15, HW_SD
Application Phone Module
Figure 21: Pin 15 HW_SD Diagram
The following sequence and diagram illustrate a proper shutdown sequence initiated by the
application via the HW_SD pin.
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