Pin Description - Quectel EC25-AUX Hardware Design

5. Pins 119~126 and 128 are used for SGMII interface.
6. Pins 24~27 for PCM function are multiplexing pins used for audio design on EC25 module and BT
function on FC20 module.
7. SD card, wireless connectivity and SGMII interfaces (pins 37~40, 118, 127, 129~139, 119~126, 128,
23, 28~34) are not supported on ThreadX modules.
8. Keep all RESERVED pins and unused pins unconnected.
9. GND pins 85~112 should be connected to ground in the design. RESERVED pins 73~84 should not
be designed in schematic and PCB decal, and these pins should be served as a keepout area.

3.3. Pin Description

The following tables show the pin definition of EC25 module.
Table 3: I/O Parameters Definition
Type
AI
AO
DI
DO
IO
OD
PI
PO
Table 4: Pin Description
Power Supply
Pin Name Pin No.
VBAT_BB 59, 60
EC25_Hardware_Design
Description
Analog Input
Analog Output
Digital Input
Digital Output
Bidirectional
Open Drain
Power Input
Power Output
I/O Description
Power supply for
PI module's baseband
part
LTE Standard Module Series
EC25 Hardware Design
DC Characteristics
Vmax=4.3V
Vmin=3.3V
Vnorm=3.8V
Comment
It must be provided with
sufficient current up to
0.8A.
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