User guide

Trace Port Interface Unit
ARM DDI 0337I Copyright © 2005-2008, 2010 ARM Limited. All rights reserved. 11-9
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Figure 11-6 Integration ETM Data bit assignments
Table 11-6 shows the Integration ETM Data bit assignments.
11.3.6 ITATBCTR2
The ITATBCTR2 characteristics are:
Purpose Integration test.
Usage constraints You must set bit [0] of TPIU_ITCTRL to use this register. See Integration
Mode Control, TPIU_ITCTRL on page 11-11.
Configurations This register is available in all processor configurations.
Attributes See Table 11-1 on page 11-5.
Figure 11-7 shows the ITATBCTR2 bit assignments.
Figure 11-7 ITATBCTR2 bit assignments
ETM data 2 ETM data 1
ETM data 0
31 0
29 2728 26 2425 23 16 15 87
ETM byte count
ETM ATVALID
ITM byte count
ITM ATVALID
30
Reserved
Table 11-6 Integration ETM bit assignments
Bits Name Function
[31:30] - Reserved
[29] ITM ATVALID input Returns the value of the ITM ATVALID signal.
[28:27] ITM byte count Number of bytes of ITM trace data since last read of Integration ITM Data Register.
[26] ETM ATVALID input Returns the value of the ETM ATVALID signal.
[25:24] ETM byte count Number of bytes of ETM trace data since last read of Integration ETM Data Register.
[23:16] ETM data 2 ETM trace data. The TPIU discards this data when the register is read.
[15:8] ETM data 1
[7:0] ETM data 0
31
0
Reserved
1
ATREADY1
ATREADY2