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ICEPick Module
shows the registers available in the ICEPick control block and the value of the
TAP_ROUTING_REG[27:24] bit field used to access them.
Table 27-22. Debug TAP Linking Control Block Registers
Register
Register Name
Description
0x0
SDTR0
Secondary debug TAP 0 register
0x1
SDTR1
Secondary debug TAP 1 register
0x2
SDTR2
Secondary debug TAP 2 register
0x3
SDTR3
Secondary debug TAP 3 register
0x4
SDTR4
Secondary debug TAP 4 register
0x5
SDTR5
Secondary debug TAP 5 register
0x6
SDTR6
Secondary debug TAP 6 register
0x7
SDTR7
Secondary debug TAP 7 register
0x8
SDTR8
Secondary debug TAP 8 register
0x9
SDTR9
Secondary debug TAP 9 register
0xA
SDTR10
Secondary debug TAP 10 register
0xB
SDTR11
Secondary debug TAP 11 register
0xC
SDTR12
Secondary debug TAP 12 register
0xD
SDTR13
Secondary debug TAP 13 register
0xE
SDTR14
Secondary debug TAP 14 register
0xF
SDTR15
Secondary debug TAP 15 register
Table 27-23. SDTRj
Description
There is a separate Secondary Debug TAP Register (SDTR) for each secondary TAP (j = 0 to 15).
Type
RW
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
TAP_ROUTING
CLOCK
POWER
RESERVED
TAPPOWER
VISIBLETAP
SELECTTAP
DEBUGMODE
TAPPRESENT
BLOCKNTRST
INHIBITSLEEP
FORCEACTIVE
FORCEPOWER
DEBUGENABLE
RESETCONTROL
TAPACCESSIBLE
UNNATURALRESET
DEBUGANDEXECUTE
CLOCKDOWNDESIRED
POWERDOWNDESIRED
POWERLOSSDETECTED
INRESETANDRELEASEWIR
Bits
Field Name
Description
Type
Reset
31:24
TAP_ROUTING
See
.
RW
-
23
BLOCKNTRST
When this bit is 0, the nTRST signal for this secondary TAP
RW
0 (ARST)
follows the device level nTRST.
When this bit is 1 and the TAP is deselected, the nTRST signal
for this secondary TAP is held high.
22
RESERVED
Reserved, read return reset value.
R
0
21
POWERLOSSDETECTED When this bit is 1, the module associated with this TAP has had
R
0 (ARST)
its power turned off. Once a power loss has been detected, this
bit will remain 1 until manually cleared by writing to this bit.
Writing a 1 to this bit clears this latched value back to 0.
Writing a 0 has no effect.
3603
SWPU177N – December 2009 – Revised November 2010
Debug and Emulation
Copyright © 2009–2010, Texas Instruments Incorporated