2 trace buffer read pointer register (tb_rd), 3 trace buffer write pointer register (tb_wr), 4 trace buffer register (tb_buff) – Freescale Semiconductor StarCore SC140 User Manual
Page 179: Trace buffer read pointer register (tb_rd) -69, Trace buffer write pointer register (tb_wr) -69, Trace buffer register (tb_buff) -69, Loop timing -32
Trace Unit Registers
SC140 DSP Core Reference Manual
4-69
4.11.2 Trace Buffer Read Pointer Register (TB_RD)
TB_RD is a 16-bit register that points to the location in the RAM buffer from which the next value is read.
The register is reset when the trace buffer is enabled.
4.11.3 Trace Buffer Write Pointer Register (TB_WR)
TB_WR is a 16-bit register that points to the next location available for writing into the buffer. The register
is reset when the trace buffer is enabled.
4.11.4 Trace Buffer Register (TB_BUFF)
This 32-bit register is used to read the contents of the trace buffer. For details, see
“Reading the Trace Buffer (TB_BUFF).”
It is a pipeline register inside the core, not the off-core trace
buffer.