Battery; External Leds (Ethernet) - ADLINK Technology CoreModule 920 Reference Manual

Chapter 3

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.
Table 3-17. External Battery Input Header (J12)
Pin # Signal
1 V_BATT
2 GND
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.
Table 3-18. GLAN1 External LED Pin Signals (J2)
Pin # Signal
1 V3.3_CONN
2 GBE1_ACT_LED
3 GBE1_LINK1000_LED
4 GBE1_LINK100_LED
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.
Table 3-19. GLAN2 External LED Pin Signals (J3)
Pin # Signal
1 V3.3_CONN
2 GBE2_ACT_LED
3 GBE2_LINK1000_LED
4 GBE2_LINK100_LED
Note: The shaded table cell denotes power. Configure Ethernet LEDs for Active Low operation.
34
Description
+3.0 volts DC
Ground
Description
+3.3 volts – Provides +3.3 volts to external LED (Pins 1-2 for
Green LED)
Ethernet Activity
Gigabit Ethernet Link
Fast Ethernet Link with +3.3 volts power (Pins 3-4 for Bi-Color
LED)
Description
+3.3 volts – Provides +3.3 volts to external LED (Pins 1-2 for
Green LED)
Ethernet Activity
Gigabit Ethernet Link
Fast Ethernet Link with +3.3 volts power (Pins 3-4 for Bi-Color
LED)
Reference Manual
Hardware
CoreModule 920