User manual

38 GR-LEON4-ITX Development Board

User Manual

Pin Name Comment

1 DGND Ground

2 VREF 3.3V

3 DGND Ground

4 TMS JTAG: TMS

5 DGND Ground

6 TCK JTAG: TCK

7 DGND Ground

8 TDO JTAG: TDO

9 DGND Ground

10 TDI JTAG: TDI

11 DGND Ground

12 NC No connect

13 DGND Ground

14 NC No connect

Table 4-24: J20 -JTAG signal interface

Pin Name Comment

1 +3V3 Provides 3.3V to PCI slots

2 +3V3 Provides 3.3V to PCI slots

3 DGND Ground

4 +5V +5V main supply for board

5 DGND Ground

6 +5V +5V main supply for board

7 DGND Ground

8 POWEROK Power OK signal from ATX supply (not used)

9 +5VSB +5V stand-by power (not used)

10 +12V Provides +12V to PCI slots

11 +3V3 Provides 3.3V to PCI slots

12 -12V Provides -12V to PCI slots

13 DGND Ground

14 POWERON Power on signal to ATX Supply (strapped to DGND on board)

15 DGND Ground

16 DGND Ground

17 DGND Ground

18 -5V -5V from ATX power supply (not used)

19 +5V +5V main supply for board

20 +5V +5V main supply for board

Table 4-25: J21 -POWER - ATX Style power input connector