Product Info

LTE Module Series
EG91 Hardware Design
EG91_Hardware_Design 38 / 93
Figure 11: Turn on the Module Using Button
The power-on scenario is illustrated in the following figure.
V
IL
≤0. 5V
V
H
=0.8V
VBAT
PWRKEY
≥500ms
RESET_N
STATUS
(DO)
Inactive
ActiveUART
NOTE
Inactive ActiveUSB
≥2.5s
≥12s
≥13s
VDD_EXT
BOOT_CONFIG &
USB_BOOT Pins
≥100ms, after this time, the BOOT_CONFIG &
USB_BOOT pins can be set high level by
external circuit.
About 100ms
Figure 12: Power-on Scenario