STMicroelectronics STM32F05 series Reference Manual page 724

Debug support (DBG)
Table 111. SW-DP registers (continued)
A(3:2)
01 Read/Write
01 Read/Write
10 Read
10 Write
11 Read/Write
724/742
CTRLSEL bit
R/W of SELECT
register
0
1
Doc ID 018940 Rev 1
Register
Purpose is to:
– request a system or debug power-up
– configure the transfer operation for AP
accesses
DP-CTRL/STAT
– control the pushed compare and pushed
verify operations.
– read some status flags (overrun, power-up
acknowledges)
Purpose is to configure the physical serial
WIRE
port protocol (like the duration of the
CONTROL
turnaround time)
Enables recovery of the read data from a
READ
corrupted debugger transfer, without
RESEND
repeating the original AP transfer.
The purpose is to select the current access
SELECT
port and the active 4-words register window
This read buffer is useful because AP
accesses are posted (the result of a read AP
request is available on the next AP
READ
transaction).
BUFFER
This read buffer captures data from the AP,
presented as the result of a previous read,
without initiating a new transaction
RM0091
Notes