Quectel EG91 Series Hardware Design page 35

The power-on scenario is illustrated in the following figure.
VBAT
PWRKEY
VDD_EXT
BOOT_CONFIG &
USB_BOOT Pins
RESET_N
STATUS
(DO)
UART
USB
EG91_Hardware_Design
S1
TVS
Close to S1
Figure 11: Turn on the Module Using Button
NOTE
≥500ms
≤0.5V
V
IL
About 100ms
≥100ms, after this time, the BOOT_CONFIG &
U SB _BOOT pi n s can b e se t hi gh l eve l by
external circuit.
≥2.5s
I nactive
I nactive
Figure 12: Power-on Scenario
LTE Standard Module Series
EG91 Hardware Design
PWRKEY
V =0.8V
H
≥ 12s
≥ 13s
Active
Active
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