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Applicant: Motorola, INC
2.3.2.1
The ON_N signal is set high through an internal pull up resistor when power is applied to the module.
Asserting the ON_N signal low for a minim
n
ormal power-off process, which includes disabling of all applications interfaces (UART, SIM card, audio,
etc.) and closing the network connection.
T
he following figure illustrates the power-off timings when using the ON_N signal.
FIGURE 6 – ON_N power off timings
VCC
1500ms min
ON_N
CTS_N
RESET_N
2.3.2.2
This section applies only to the C-Lite standard model (without charger).
The IGN signal may be used to power off the module only if it was also used to power it on. When the
IGN signal is set low the module will turn off. This will initiate a normal power-off process, which includes
disabling of all applications interfaces (UART, SIM card, audio, etc.) and closing the network connection.
The IGN signal wil
l not power off the module before 30 seconds have elapsed since it was powered-on.
This delay mechanism is implemented to protect the module from unexpected tr
during power up.
The following figure illustrates the power-off
FIGURE 7 – IGN power off timings
VCC
IGN
CTS_N
RESET_N
Turning off the module using ON_N
um of 1.5 seconds will turn the module off. This will initiate a
<50000m
Turning off the module using IGN
timings when using the IGN signal.
<5000ms
Motorola General Business Use
Page 11 of 36
FCC ID: IHDP56JE1
C24 Hardware Interface Manual
Version 0.3
ansients on the IGN line
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