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LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 67 / 104
3.19. Antenna Tuner Control Interfaces*
The module provides two methods to control external antenna tuner: through RFFE signals or GPIO
signals. Customers can choose either one according to their tuner design. The following table lists the pin
definitions of these RFFE and GPIO signals.
Table 27: Pin Definition of RFFE Interface Used to Control Antenna Tuner
The following figure shows sketch map of MIPI Tuner control:
Module
Tuner
RFFE_CLK
RFFE_DATA
VDD_EXT
VDD_RF
71
73
168
162
SCLK
SDATA
VIO
VDD
Figure 32: Sketch map of MIPI Tuner control
Table 28: Pin Definition of GPIO Interface Used to Control Antenna Tuner
Pin Name
Pin No.
I/O
Description
Comment
RFFE_CLK
71
DO
RFFE serial interface used for external
tuner control.
If unused, keep it open.
RFFE_DATA
73
IO
If unused, keep it open.
VDD_EXT
168
PO
Provide 1.8V for external RF Circuit VIO.
If unused, keep it open.
VDD_RF
162
PO
Provide 2.85V for external RF circuit.
If unused, keep it open.
Pin Name
Pin No.
I/O
Description
Comment
GPIO_3
159
IO
GPIO interface dedicated for external
tuner control.
If unused, keep it open.
GPIO_4
161
IO
If unused, keep it open.