Status Leds - Quectel UC20 User Manual

3.7. Status LEDs

UMTS&LTE EVB comprises several status LEDs (D103, D101, D109, D104, D102). Figure 19 shows the
position of LEDs.
Table 10: Description of Status LEDs
Reference Used for UMTS&LTE Module
Indicate the power supply for module is ready
D103 Bright: VBAT ON
Extinct: VBAT OFF
Indicate the module operation status
D101 Bright: module is powered on
Extinct: module is powered down
Indicate the sleep status
D109 Bright: module is in sleep mode
Extinct: module is not in sleep mode
Indicate the module network registration mode
D104, D102 The indication varies in different modules. Refer to related Hardware Design for
detailed information
UMTS&LTE_EVB_User_Guide
Figure 19: Status LEDs
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