Globalstar ST150 - Page 29

9150-0125-01 R-4
ST150M User Manual
Confidential & Proprietary Information
29
Pin Function Description Recommended Usage
P0.28/AIN4
Digital I/O /
Analog input
GPIO / Analog input
3.3V level, Standard drive, low
frequency I/O only
P0.03/AIN1
Digital I/O /
Analog input
GPIO / Analog input
3.3V level, Standard drive, low
frequency I/O only
P0.02/AIN0
Digital I/O /
Analog input
GPIO / Analog input
3.3V level, Standard drive, low
frequency I/O only
USB_D- USB Differential USB data connection –
USB_D+ USB Differential USB data connection –
VUSB Power USB device +5V input –
GPS_EXT_LNA_EN Digital Output Control signal for external GPS LNA 3.3V level
VRF_EN Digital Output Signal for indicating ASIC transmission 3V level
I2C_SDA Digital I/O I
2
C serial data 3.3V level
I2C_CLK Digital Output I
2
C serial clock 3.3V level