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SDTI Module
27.3.4.6 CoreSight Integration Mode
As a CoreSight-compliant peripheral, the SDTI provides an integration mode where the interface input
ports can be probed and the output ports can be driven. The following CoreSight integration registers are
used to set up and use this mode:
•
•
•
The
register is included for CoreSight compliance. Normally, the lower 4 bits are
used for claiming and releasing debug components. The SDTI, however, implements a more sophisticated
claim mechanism. These bits can be used as software semaphores to help manage the debug resources,
although the claim-and-enable mechanism of the SDTI resources must still be used. Writing 1 to one of
the set bits causes the corresponding bit in the claim tag value word to go high.
The
bits can be used as software semaphores to help manage the debug
resources. Writing 1 to one of the CLEAR bits causes the corresponding bit in the claim tag value word to
go low. Reading this register returns the value of the claim tag.
27.3.4.7 Serial Interface Clock Generation
The sdti_clk is derived from SDTI_FCLK with a programmable clock divider controlled by the
[3:0] SDTISCLKRATE bit field.
shows the divider for the value of the
[3:0] SDTISCLKRATE bit field.
Table 27-38. sdti_clk Divider Value
SDTISCLKRATE Value
Division Value
0x0
Division by 1
0x1
Division by 1
0x2
Division by 2
0x3
Division by 3
0x4
Division by 4
0x5
Division by 5
0x6
Division by 6
0x7
Division by 7
0x8
Division by 8
0x9
Division by 9
0xA
Division by 10
Others
Division by 1
27.3.4.8 SDTI Memory Mapping
shows the SDTI memory mapping, and
provides channel address examples.
Table 27-39. SDTI Memory Mapping
Name
Address Offset
Address
Size
Start
Stop
Start
Stop
Configuration Space (Base = 0x5450 0000)
4k
Configuration Registers
0x0 0000
0x0 002F
0x5450 0000
0x5450 002F
48
Reserved
0x0 0030
0x0 0EFF
0x5450 0030
0x5450 0EFF
3792
CoreSight Registers
0x0 0F00
0x0 0FFF
0x5450 0F00
0x5450 0FFF
256
Reserved
0x0 1000
0xF FFFF
0x5450 1000
0x545F FFFF
Window Space (Base = 0x5460 0000)
1024k
Channel 0
0x00 0000
0x00 0FFF
0x5460 0000
0x5460 0FFF
4k
CPU1 message
0x00 0000
0x00 03FF
0x5460 0000
0x5460 03FF
1k
3617
SWPU177N – December 2009 – Revised November 2010
Debug and Emulation
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