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ST STM32F446 Series User Manual

ST STM32F446 Series
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Debug support (DBG) RM0390
1290/1328 RM0390 Rev 4
33.6 ID codes and locking mechanism
There are several ID codes inside the STM32F446xx MCUs. ST strongly recommends tools
designers to lock their debuggers using the MCU DEVICE ID code located in the external
PPB memory map at address 0xE0042000.
33.6.1 MCU device ID code
The STM32F446xx MCUs integrate an MCU ID code. This ID identifies the ST MCU part-
number and the die revision. It is part of the DBG_MCU component and is mapped on the
external PPB bus (see Section 33.16 on page 1303). This code is accessible using the
JTAG debug pCat.2ort (4 to 5 pins) or the SW debug port (two pins) or by the user software.
It is even accessible while the MCU is under system reset.
Only the DEV_ID[11:0] should be used for identification by the debugger/programmer tools.
DBGMCU_IDCODE
Address: 0xE004 2000
Only 32-bits access supported. Read-only.
33.6.2 Boundary scan TAP
JTAG ID code
The TAP of the STM32F446xx BSC (boundary scan) integrates a JTAG ID code equal to
0x06413041.
33.6.3 Cortex
®
-M4 with FPU TAP
The TAP of the Arm
®
Cortex
®
-M4 with FPU integrates a JTAG ID code. This ID code is the
Arm
®
default one and has not been modified. This code is only accessible by the JTAG
Debug Port.
This code is 0x4BA00477 (corresponds to Cortex
®
-M4 with FPU r0p1, see Section 33.2:
Reference Arm® documentation).
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
REV_ID
rrrrrr r r r r rrrrrr
1514131211109876543210
Res. Res. Res. Res. DEV_ID
rrrrrrrrrrrr
Bits 31:16 REV_ID[15:0] Revision identifier
This field indicates the revision of the device:
0x1000 = Revision A
Bits 15:12 Reserved, must be kept at reset value.
Bits 11:0 DEV_ID[11:0]: Device identifier
The device ID is 0x421

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ST STM32F446 Series Specifications

General IconGeneral
BrandST
ModelSTM32F446 Series
CategoryMicrocontrollers
LanguageEnglish

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