Hardware Development Guide of Module Product
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46
MF206A
3.14.2
Interface Application
The LGA module has three PINs to control the LED indicator, which is used to indicate the network connection
status. The different modes of status indicator flashing indicate different network statuses. All the three PINs use
the current sink type of current source for control, which connects to the negative end of LED and connects to
VPH_PWR externally, to directly drive LED. Figure 3-16 is the reference circuit design diagram.
The flashing of indicator is controlled by the switch of RF, and the LED PIN indicates the control signal to the
external. The indicator status of network is as defined in Table 3-14. If the RF control is not needed, the AP
server can design the status of control indicator by itself.
Figure 3–14 Reference Circuit of Status Indicator
Table 3–14 Definition of Indicator Status
Indicator Status
Module Working Status
RED indicator always on
Not registered to the network
GREEN indicator always on
Have been registered to 2G network
GREEN indicator flashing
Have been registered to 2G network,
and there is data service as well.
BLUE indicator always on
Have been registered to 3G network
BLUE indicator flashing
Have been registered to 3G network,
and there is data service as well.