Ieee 1149.1 (Jtag) Input Port - STMicroelectronics SPC572L series Reference Manual

RM0400
Table 510. Watchpoint field WPHIT[11:0] format for WPHIT[14:12] = 0b010(Continued)
WPHIT bit
6
7
11:8
Table 511. Watchpoint field WPHIT[11:0] format for WPHIT[14:12] = 0b011
WPHIT - bit
0
1
2
3
4
5
11:6
42.6.4.1.1 Temporal ordering of transmitted messages
All messages are sent out in the sequence their related event actually occurred. The GTM
interface with the GTMDI provides the GTM signals to be monitored and captured. At the
occurrence of any event that would cause a message, a snapshot of all information needed
by the message formatter to generate a message is queued. Doing so, several events from
either MCS, TIM, ATOM, ARU, etc., can be queued at the same time.
42.6.4.1.2 Interleaved messages
Two MCS cores, TIM channels and other sources can be enabled for trace. The GTMDI
formats and queues all messages in the order they are generated. Since there can be
message inversion among sources during the send process, if enabled by the TSFT bit in
Figure 407
globally synchronized among all Nexus clients at SoC level.
42.6.5

IEEE 1149.1 (JTAG) input port

The GTMDI block uses the IEEE 1149.1 TAP for accessing registers. This port is shared
among all TAP controllers on the SoC. This sharing is controlled by the value in the
instruction register and client select control register. The GTMDI implements a Nexus
controller state machine that transitions based on the state of the IEEE 1149.1 state
machine shown in
defined by the IEEE-ISTO 5001-2002 standard.
The instructions implemented by the GTMDI TAP controller are listed in
other instruction is received it is treated as a BYPASS.
or by the NAR, the messages are sent along with a timestamp. This timestamp is
Figure 455. The Nexus controller state machine, shown in
DocID027809 Rev 4
GTM Development Interface (GTMDI)
Selected source
SPEB (NIPD NEGEDGE)
SPEB (NIPD POSEDGE)
Reserved
Selected source
TBU0 Watchpoint 1
TBU0 Watchpoint 2
TBU1 Watchpoint 1
TBU1 Watchpoint 2
TBU2 Watchpoint 1
TBU2 Watchpoint 2
Reserved
Figure 456, is
Table 512. If any
949/2058
960