LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 49 / 76
“*” means under development.
3.20. GRFC Interfaces*
The module provides two general RF control interfaces. Those can be used for control external antenna
tuner. This function is under development.
Table 27: Pin Definition of GRFC Interfaces
Table 28: Logic Levels of GRFC Interfaces
1. “*” means under development.
2. GRFC1 is a BOOT_CONFIG pin. It should not be pulled up before startup.
V
IL
-0.3 0.6 V
V
IH
1.2 2.0 V
V
OL
0 0.45 V
V
OH
1.35 1.8 V
Pin Name Pin No. Description Comments
GRFC1 83 General RF control interface
BOOT_CONFIG.
Do not pull it up before startup.
1.8V power domain.
GRFC2 94 General RF control interface 1.8V power domain.
Parameter Min. Max. Unit
V
OL
0 0.45 V
V
OH
1.35 1.8 V
NOTE
NOTE
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