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Contents
JTAG interfaceEdit
DescriptionEdit
JTAG signals are routed to a dedicated connector on the RIALTO SBC PCB.
The connector is placed near the J60 mezzanine connector and J46 WiFi connector (please see the picture below).
SignalsEdit
The following table describes the interface signals:
| Pin# | Pin name | ARM-20 JTAG | Notes |
|---|---|---|---|
| 1 | DGND | Ground | 4,6,8,10,12,14,16,18,20 |
| 2 | JTAG_TCK | 9 | |
| 3 | JTAG_TMS | 7 | |
| 4 | JTAG_TDO | 13 | |
| 5 | JTAG_TDI | 5 | |
| 6 | JTAG_nTRST | 3 | keep the possibility to be unconnected |
| 7 | CPU_PORn | 15 | keep the possibility to be unconnected |
| 8 | JTAG_MOD | Internally used as GPIO for USB OTG power enable in Host mode | |
| 9 | n.c. | ||
| 10 | JTAG_VREF | 1 | 3V3 internal pull-up |