User's Manual

Host Requirements 35
M3090 Integrator’s Manual, Doc.no: 198 17 - KRD 102 303 Uen, Rev B
 212))IXQFWLRQ
An ON/OFF function can be implemented using standard MASC-commands,
see )LJXUH.
Start the modem by grounding pin 24 for a minimum of 10 mS (“WAKE” – pin
24 – is active low).
Shut the modem off using the “FO” MASC-command. When “FO” is sent,
“WAKE” must be high.  )LJX UH   shows an example of how to implement this
using an Open Collector Connection. A relay or a switch can also be used.
)LJXUH ([DPSOHRIKRZWRLPSOHPHQWDQ212))IXQFWLRQ
M 3090
Main voltage
regulator
5V Out
Micro-Controller
I/O keeps
"ENABLE" low and
controls shutoff
with "FO" order
WAKE
Activate the modem
with a pulse on
"WAKE" of min 10 ms
Supply
voltage
6-9 V DC
1,2
24
51k
47
ENABLE
4/LZE 401 182 R1