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SIM802 Hardware Design
3.4.1.1 Turn on SIM802 using the PWRKEY Pin (Power on)
Turn on the SIM802 by driving the PWRKEY to a low level voltage for a period time. This Pin is
pulled up to VBAT in the module. The simple circuit illustrates as the following figures.
PWRKEY
4.7K
Turn on impulse
47K
Figure 6: Turn on SIM802 using driving circuit
S1
PWRKEY
TVS1
Figure 7: Turn on SIM802 using button
The power on scenarios illustrates as following figure.
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SIM802_HD_V2.01
12.01.2010
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