Automotive Module Series
AG525R-GL QuecOpen
Hardware Design
AG525R-GL_QuecOpen_Hardware_Design 45 / 104
3.6.4. Monitor the Power Supply
API can be used to monitor the VBAT_BB voltage value. For more details, see document [2].
3.7. Power on and off Scenarios
3.7.1. Turn on Module with PWRKEY
Table 8: PWRKEY Pin Description
Pin Name Pin No. Description DC Characteristics Comment
PWRKEY 7 Turn on/off the module
V
IH
max = 1.89 V
V
IH
min = 1.17 V
V
IL
max = 0.63 V
1.8 V power domain.
Pulled-up internally.
Active low.
When the module is in power-off mode, it can be turned on by driving PWRKEY low for at least 500 ms. It
is recommended to use an open drain/collector driver to control the PWRKEY. A simple reference circuit is
illustrated in the following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥ 500 ms
Figure 10: Turn on the Module Using Driving Circuit
Another way to control the PWRKEY is using a button directly. When pressing the key, electrostatic strike
may generate from the finger. Therefore, a TVS component is indispensable to be placed nearby the
button for ESD protection. A reference circuit is shown in the following figure.
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