Table 263. Jtag-Dp Data Registers - ST STM32WL55JC Reference Manual

RM0453
A(3:2)
Address R/W
value
R
0x0 00
W
0x4 01 R/W
R
0x8 10
W
R
0xC 11
W
1. Access to the DP_ABORTR register from the JTAG-DP is done using the ABORT instruction.
2. Only accessible via SW-DP. Register is "reserved" via JTAG-DP.
Table 267. Debug port registers
DP_DIPDR register (see
Contains the IDCODE for the debug port.
(1)
DP_ABORTR register
Aborts the current AP transaction. This register is also used to clear the error flags in the
DP_CTRLSTATR register.
If DP_SELECTR.DPBANKSEL = 0, DP_CTRLSTATR register (see
Controls the DP and provides status information.
If DP_SELECTR.DPBANKSEL = 1, DP_DLCR register
Controls the operating mode of the SWD data link.
If DP_SELECTR.DPBANKSEL = 2, DP_TARGETIDR register (see
Provides target identification information.
If DP_SELECTR.DPBANKSEL = 3, DP_DLPIDR register
Provides the SWD protocol version.
(2)
DP_RESENDR register
Returns the value returned by the last AP read or DP_RDBUFFR read. Used in the event
of a corrupted read transfer.
DP_SELECTR register (see
Selects the access port, access port register bank, and DP register at address 0x4.
DP_BUFFR register (see
– Via JTAG-DP - Used to allow the debugger to get the final result after a sequence of
operations (without requesting new JTAG-DP operation).
– Via SW-DP - Contains the result of the preceding AP read access, allowing a new AP
access to be avoided.
DP_TARGETSELR register
On a write to DP_TARGETSELR immediately following a line reset sequence, the target
is selected if both the following conditions are met:
– Bits [31:28] match bits [31:28] in the DP_DLPIDR register.
– Bits [27:0] match bits [27:0] in the DP_TARGETIDR register.
Writing any other value de-selects the target. Debug tools must write 0xFFFFFFFF to de-
select all targets. This is an invalid TARGETID value. All other invalid TARGETID values
are reserved.
Description
Section 38.4.1)
(see Section 38.4.2)
(see Section 38.4.7)
Section 38.4.8)
Section 38.4.9)
(2)
(see Section 38.4.10)
RM0453 Rev 2
Debug support (DBG)
Section 38.4.3)
(2)
(see Section 38.4.4)
Section 38.4.5)
(2)
(see Section 38.4.6)
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