Product Info

LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 45 / 112
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
VBA T
PWRKEY
≥500ms
RESET_N
STATUS
(OD)
Inactive
Act ive UART
NOTE
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 ca n be set h igh level b y exter nal circuit
Figure 12: Power-on Scenario of Module