Siemens HC15 Spezifikationen PDF herunterladen (Seite 31)

HC15 Hardware Interface Description

3.8 PWR_IND Signal

HC15_HD_v01.000 Page 31 of 67 2007-1-19

Confidential / Released

3.8 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.

Figure 12: PWR_IND signal

3.8.1 Network Connectivity Status Signals

Two status signals (STATUS0 and STATUS1) are provided for signaling the module’s connectivity status. Each

signal acts as a current sink and can be used to control externally connected LEDs. For electrical characteristics

see Table 16.

Additional pull up resistors or LED's are required as shown in the below sample circuit for a status LED:

Figure 13: Status LED Circuit (example)

Please ensure that the voltage applied at the status pins does not exceed BATT+.

This status function has to be activated with AT^SLED. For details see the [1].

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 66 67

Keine Kommentare

Siemens HC15 Spezifikationen Seite 31