User's Manual
PCS3_HD_v01.000-03
Confidential / Preliminary
Page 48 of 101
2013-10-21
PCS3 Hardware Interface Description
3.10 Control Signals
SMT
interface
3.10
Control Signals
3.10.1
PWR_IND Signal
PWR_IND notifies the on/off state of the module. High state of PWR_IND indicates that the
module is switched off. The state of PWR_IND immediately changes to low when IGT is pulled
low. For state detection an external pull-up resistor is required.
Module
e.g. BATT+
Power supply
On/Off
PWR_IND
(open drain
driver)
Figure 21: PWR_IND signal
3.10.2
Network Connectivity Status Signals
The STATUS line serves to indicate the module’s network connectivity state and can be used
to control an externally connected LED as shown in Figure 22. To operate the LED a buffer,
e.g. a transistor or gate, must be included in the external application.
VCC
LED
STATUS
0 = LED off
1 = LED on
GND
Figure 22: LED Circuit (Example)
For electrical characteristics of the STATUS line see Table 22. The network connectivity signal
function is volatile and has to be activated after module startup with AT^SLED. For details on
the command as well as status and mode indications through blinking intervals see [1].