LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 38 / 106
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)
I nactive
Active
UART
I nactive
Active
USB
≥
≥
12s
≥
13s
VDD_EXT
BOOT_CONFIG &
USB_BOOT Pins
About 100ms
10s
NOTE 1
≥
100ms. After this time, the BOOT_CONFIG
pins can be set to high level by external circuit.
Figure 12: Timing of Turning on Module