LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 44 / 130
Figure 11: Turn on the Module by Using Keystroke
The power-on scenario is illustrated in the following figure.
V
IL
≤0.5V
V
H
=0.8V
VBAT
PWRKEY
≥500ms
RESET_N
STATUS
(OD)
Inactive
Act ive
UART
NOTE 1
Inactive
Act ive
USB
≥2.5s
≥12s
≥13s
VDD_EXT
About 100ms
BOOT_CONFIG &
USB_BOOT Pins
≥100ms. Afte r this time, the BOOT_CONFIG
pins can b e set to high level by external circuit.
Figure 12: Timing of Turning on Module
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