External Trace Connection - 1.0 English - PG428

MicroBlaze Debug Module V (MDM V) LogiCORE IP Product Guide (PG428)
Document ID
PG428
Release Date
2025-11-20
Version
1.0 English

When external trace output is used, the output signals must be assigned to appropriate package pins.

The RISC-V Trace Connector Specification, Version 1.0, defines two connectors:

  • MIPI20 Debug and Trace Connector
  • Mictor 38-bit Debug and Trace Connector

As an example, the following table lists the nominal assignment for the KC-705 board when using the AMD FMC XM105 Debug Card to connect the trace signals to the Mictor connector. The FMC HPC connector pins are also listed, which allows deriving the pin assignment for other boards using the same FMC connector and debug card.

Table 1. Trace Signal Pin Assignments
KC705 FMC HPC Pin Name Mictor Pin Number
Signal Pin IOB
TRACE_clk_o C25 No LA00_CC_P 6
TRACE_ctl C30 Yes LA10_N 36
TRACE_data[0] D29 Yes LA10_P 38
TRACE_data[1] H27 Yes LA03_N 28
TRACE_data[2] G28 Yes LA04_P 26
TRACE_data[3] F28 Yes LA04_N 24
TRACE_data[4] B30 Yes LA09_P 22
TRACE_data[5] A30 Yes LA09_N 20
TRACE_data[6] D26 Yes LA01_CC_P 18
TRACE_data[7] C26 Yes LA01_CC_N 16
TRACE_data[8] G29 Yes LA05_P 37
TRACE_data[9] F30 Yes LA05_N 35
TRACE_data[10] H30 Yes LA06_P 33
TRACE_data[11] G30 Yes LA06_N 31
TRACE_data[12] E28 Yes LA07_P 29
TRACE_data[13] D28 Yes LA07_N 27
TRACE_data[14] E29 Yes LA08_P 25
TRACE_data[15] E30 Yes LA08_N 23
Logic 0 = 0V H26 No LA03_P 30
Logic 0 = 0V H25 No LA02_N 32
Logic 1 = 1.8V H24 No LA02_P 34

The IOB column indicates pins where it is recommended to add a constraint to place the output flip-flop in the pad to minimize skew. The parameter C_TRACE_OUTPUT must be set to 1 and C_TRACE_DATA_WIDTH must be set to 16 with this pin assignment.