SPRUJ40C may 2022 – may 2023
AM62x SKEVM board include XDS110 class on board emulation. The connection for the emulator uses an USB 2.0 micro-B connector and the circuit acts as a Bus powered USB device. The VBUS power from the connector will be used to power the emulation circuit such that connection to the emulator is not lost when the power to the SKEVM is removed. Voltage translation buffers are used to isolate the XDS110 circuit from the rest of the SKEVM.
Optionally, JTAG Interface on SKEVM is also provided through 20 Pin Standard JTAG cTI Header J17. This allows the user to connect an external JTAG Emulator Cable. Voltage translation buffers are used to isolate the JTAG signals from cTI header from the rest of the SKEVM. The output from the voltage translators from XDS110 Section and cTI Header Section are muxed and connected to AM62x JTAG Interface. If a connection to the cTI 20 Pin JTAG connector is sensed using a presence detect circuit, the mux will be set to route the 20 pin signals from the cTI connector to the AM62x SoC in place of the on-board emulation circuit.
The pin-outs of the cTI 20 pin JTAG connector are given in Table 2-7. A ESD protection part number TPD4E004 is provided on USB signals to steer ESD current pulses to VCC or GND. TPD4E004 protects against ESD pulses up to ±15-kV Human-Body Model (HBM) as specified in IEC 61000-4-2 and provides ±8-kV contact discharge and ±12- kV air-gap discharge.
Pin No. | Signal |
---|---|
1 | JTAG_TMS |
2 | JTAG_TRST# |
3 | JTAG_TDI |
4 | JTAG_TDIS |
5 | VCC3V3_SYS |
6 | NC |
7 | JTAG_TDO |
8 | SEL_XDS110_INV |
9 | JTAG_cTI_RTCK |
10 | DGND |
11 | JTAG_cTI_TCK |
12 | DGND |
13 | JTAG_EMU0 |
14 | JTAG_EMU1 |
15 | JTAG_EMU_RSTn |
16 | DGND |
17 | NC |
18 | NC |
19 | NC |
20 | DGND |