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Debug Test Access Port

ID012310 Non-Confidential, Unrestricted Access

• 32-bit assembled code of the instruction, instr, to be executed, for ITR[31:0].

2. The following data is scanned out:

• The value of the Ready flag, to be stored in stateout.

• 32 bits to be ignored. The ITR is write-only.

DATA <datain> [<stateout> [dataout]]

Go through Capture-DR, go to Shift-DR. Scan in a data item and scan out another one, go

through Update-DR. Either the DTR, scan chain 5, or the DSCR, scan chain 1, must be selected

when using this macro.

1. If scan chain 5 is selected, scan in:

• Any value for the nRetry or Valid flag. These bits are read-only.

• Any value for the InstCompl flag. This bit is read-only.

• 32-bit datain value for rDTR[31:0].

2. The following data is scanned out:

• The contents of wDTR[31:0], to be stored in dataout.

• If the DSCR[13] execute ARM instruction enable bit is set, the value of the Ready

flag is stored in stateout.

• If the DSCR[13] execute ARM instruction enable bit is clear, the nRetry or Valid

flag, depending on whether EXTEST or INTEST is selected, is stored in stateout.

3. If scan chain 1 is selected, scan in:

• 32-bit datain value for DSCR[31:0].

Stateout and dataout fields are not used in this case.

DATAOUT <dataout>

1. Scan out a data value. DSCR, scan chain 1, and INTEST must be selected when using this

macro.

2. If scan chain 1 is selected, scan out the contents of the DSCR, to be stored in dataout.

3. The scanned-in value is discarded, because INTEST is selected.

REQ <address> <data> <nR/W> [<stateout> [dataout]]

Go through Capture-DR, go to Shift-DR, scan in a request and scan out the result of the former

one, go through Update-DR. Scan chain 7, and either INTEST or EXTEST, must be selected

when using this macro.

1. Scan in:

• 7-bit address value for Address[6:0]

• 32-bit data value for Data[31:0]

• 1-bit nR/W value, 0 for read and 1 for write, for the Ready/nRW field.

2. Scan out:

• the value of the Ready/nRW bit, to be stored in stateout

• the contents of the Data field, to be stored in dataout.

ARM ARM1176JZF-S User Manual

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