Suppress Mode Triggers Register (Nar_Stcr) - STMicroelectronics SPC572L series Reference Manual

RM0400
specified in units of the trace memory bus block transfer size (64, 128, 256, or 384 bytes),
so the actual size of the reserved memory block depends on the BTS setting. The following
figure shows the format of the NAR_TCR.
Register index: 6
31 30
R
BTM BTS
W
Reset 0 0
15 14
R
W
Reset 0 0
Figure 1118. Trace memory bus control register (NAR_TCR)
The NAR_TCR is described in the following table.
Field
Block Transfer Mode.
31
0 Data for the Trace Memory bus port is transmitted one word at a time, upon first availability
BTM
1 Data to the Trace Memory bus port is bundled into blocks before transmitting
Block Transfer Size.
00 Block transfer size = 64 bytes
30–29
01 Block transfer size = 128 bytes
BTS
10 Block transfer size = 256 bytes
11 Block transfer size = 384 bytes
Block Transfer Threshold.
00 Full threshold. Number of entries in partition must equal block transfer size before block transfer starts
28–27
01 Begin transfer when block is 25% full
BTH
10 Begin transfer when block is 50% full
11 Begin transfer when block is 75% full
26–24 Reserved. These bits must be written with 0.
Trace Memory Bus Block Wrap.
32
0 NAR stops writing to the Trace Memory bus debug memory space once Max Size has been reached
TBW 1 NAR overwrites Trace Memory bus debug memory from the beginning upon Trace Memory bus block
overflow.
22–0 Trace Memory Bus Max Transfer Size.
MXFR Total size of the dedicated debug memory space, in Trace Memory bus data transfer blocks.
65.4.4

Suppress mode triggers register (NAR_STCR)

Four suppress mode triggers are provided for precise control of the NAR suppress mode
feature described in
available on the PD NAR and do not apply to the BD NAR. The registers are present in the
BD NAR, but input suppress triggers are not connected. Each trigger can be programmed to
29 28 27 26
BTH 0
0 0 0 0
13 12 11 10
0 0 0 0
Table 1056. NAR_TCR field description
Section 65.5.4, Suppress
DocID027809 Rev 4
25 24 23 22
0 0 TBW
0 0 0 0
9 8 7 6
MXFR
0 0 0 0
Description
mode. The suppress mode triggers are only
Nexus Aurora Router (NAR)
21 20 19 18
MXFR
0 0 0 0
5 4 3 2
0 0 0 0
17 16
0 0
1 0
0 0
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