Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 39 / 139
ADC0
151
AI
General purpose ADC
interface
Max input voltage:
1.8V.
ADC1
153
AI
General purpose ADC
interface
Max input voltage:
1.8V.
Antenna Interfaces
Pin Name
Pin
No.
I/O
Description
DC
Characteristics
Comment
ANT_MAIN
19
AI/
AO
Main antenna interface
50
Ω impedance.
ANT_DRX
149
AI
Diversity antenna
interface
ANT_GNSS
134
AI
GNSS antenna
interface
ANT_WIFI/BT
129
AI/
AO
Wi-Fi/BT antenna
interface
ANT_WIFI_
MIMO
324
AI/
AO
Wi-Fi MIMO antenna
interface
50
Ω impedance;
SC66-CE and SC66-W
do not support this
function.
FM_ANT
244
AI
FM antenna interface
FM function is still
under development.
GPIO Interfaces
Pin Name
Pin
No.
I/O
Description
DC
Characteristics
Comment
GPIO_21
231
IO
GPIO
V
IL
max=0.63V
V
IH
min=1.17V
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
GPIO_34
236
IO
GPIO
1.8V power domain.
GPIO_40
238
IO
GPIO
1.8V power domain.
GPIO_41
237
IO
GPIO
1.8V power domain.
GPIO_55
178
IO
GPIO
1.8V power domain.
GPIO_56
177
IO
GPIO
1.8V power domain.
GPIO_72
239
IO
GPIO
1.8V power domain.
GPIO_73
59
IO
GPIO
1.8V power domain.
GPIO_74
58
IO
GPIO
1.8V power domain.
GPIO_76
232
IO
GPIO
1.8V power domain.