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
