SATEL-TR49
Integration Guide, V 1.7
23
4.6
Stat pin
The STAT-pin indicates the status of the device. It can be used to drive or sink a LED current using
a proper series resistor. STAT-pin drive or sink capability is +/-10mA at 3.3 V. It is recommended
to use VCC_IO for LED current.
Notice that if STAT-pin is used to sink LED current, LED behavior is opposite to driving scheme.
The behavior of the STAT pin is described down below.
Modes of STAT pin:
Blink cycle
Mode
“1”
- statically
M
odule is operational “searching for a new frame”
“0”
for the endurance of the
received frame.
“0” when module is receiving data from air interface.
In practical cases will toggle at the frequency of the data
packets on the air interface.
“0” statically
Module is in sleep1 mode
The pin is toggled in transmission
interval
Module is sending data Over the Air
Pin is toggled in 1 s interval
Module has the connection to Configuration Manager
program.
Pin is toggled in 500 ms interval
SL command mode set to
OFF
and SL commands enabled
using “+ + +”
sequence, section 7.2.
Pin is toggled in 250 ms interval
Module has detected a fault, fault codes can be read via
Configuration Manager program.
4.7
VCC pins
VCC pins are to feed operating voltage to the module. Limit for this voltage is mentioned in
chapter 2.2 DC electrical specifications. User must take into consideration surge current and
current consumption issues before using these pins. Also the user must be aware for any voltage
drop on the feeding path.
4.8
UART pins
Pins 7, 8, 9, 10 are used for UART serial transmission between the module and the terminal. The
UART signal level corresponds to the level in VCC_IO pin. VCC_IO pin must be fed with a correct
voltage level to match the terminal device.
4.9
GPIO pins
GPIO pins are reserved pins for future use or special applications or special features. Unused pins
should be left unconnected.