DocID018909 Rev 11
RM0090
Debug support (DBG)
1701
38.17
TPIU (trace port interface unit)
38.17.1 Introduction
The TPIU acts as a bridge between the on-chip trace data from the ITM and the ETM.
The output data stream encapsulates the trace source ID, that is then captured by a
trace
port analyzer
(TPA).
The core embeds a simple TPIU, especially designed for low-cost debug (consisting of a
special version of the CoreSight TPIU).
Figure 486. TPIU block diagram
form
a
tter
Tr
a
ce o
u
t
(
s
eri
a
lizer)
TRACECLKIN
TRACECK
TRACEDATA
[
3
:0]
TRACE
S
WO
CLK dom
a
in
TRACECLKIN dom
a
in
Extern
a
l PPB b
us
TPIU
TPIU
A
s
ynchrono
us
FIFO
A
s
ynchrono
us
FIFO
ETM
ITM
a
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