ADLINK CoreModule 920 - Manual (Page 40)

Chapter 3 Hardware
34 Reference Manual CoreModule 920
Battery
Table 3-17 lists the pin signals of the External Battery Input header for backup RTC (Real Time Clock),
which provides 2 pins with 0.049" (1.25mm) pitch.
Note: The shaded table cells denote power or ground. The RTC has an expected current draw of 6 A at
room temperature, with +3.0V. The battery is used only when power is not applied to the board.
External LEDs (Ethernet)
These two headers provide signals for two external LEDs that indicate Ethernet links and activity.
Table 3-18 defines the signals for the GLAN1 LED header that indicates Ethernet links and activity using a
single row of 4 pins with 0.049" (1.25mm) pitch.
Note: The shaded table cell denotes power. Configure Ethernet LEDs for Active Low operation.
Table 3-19 defines the signals for the GLAN2 LED header that indicates Ethernet links and activity using a
single row of 4 pins with 0.049" (1.25mm) pitch.
Note: The shaded table cell denotes power. Configure Ethernet LEDs for Active Low operation.
Table 3-17. External Battery Input Header (J12)
Pin # Signal Description
1 V_BATT +3.0 volts DC
2 GND Ground
Table 3-18. GLAN1 External LED Pin Signals (J2)
Pin # Signal Description
1 V3.3_CONN +3.3 volts – Provides +3.3 volts to external LED (Pins 1-2 for
Green LED)
2 GBE1_ACT_LED Ethernet Activity
3 GBE1_LINK1000_LED Gigabit Ethernet Link
4 GBE1_LINK100_LED Fast Ethernet Link with +3.3 volts power (Pins 3-4 for Bi-Color
LED)
Table 3-19. GLAN2 External LED Pin Signals (J3)
Pin # Signal Description
1 V3.3_CONN +3.3 volts – Provides +3.3 volts to external LED (Pins 1-2 for
Green LED)
2 GBE2_ACT_LED Ethernet Activity
3 GBE2_LINK1000_LED Gigabit Ethernet Link
4 GBE2_LINK100_LED Fast Ethernet Link with +3.3 volts power (Pins 3-4 for Bi-Color
LED)