ST-20 Argos Satellite Transmitter
TABLE 1-1. ST-20 Serial Port Configuration
Pin number
Function
1 +5
volts
2 Ground
3 NC
4 TXD
(data
out)
5 NC
6 SDE
(input)
7 CLK/HS
(input)
8 +12
volts
9 RXD
(data
in)
FIGURE 1-2. ST-20 with CR1000 Datalogger in Enclosure
2