DocID024597 Rev 3 1667/1693
RM0351 Debug support (DBG)
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44.16.4 Debug MCU APB1 freeze register1(DBGMCU_APB1FZR1)
Address: 0xE004 2008
Power on reset (POR): 0x0000 0000
System reset: not affected
Access: Only 32-bit access are supported.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LPTIM1_
STOP
Res.. Res. Res. Res. Res.
DBG_
CAN_
STOP
Res.
DBG_
I2C3_
STOP
DBG_
I2C2_
STOP
DBG_
I2C1_
STOP
Res. Res. Res. Res. Res.
rw rw rw rw rw
15 14 1312 11 10 9 8 7 65432 1 0
Res. Res. Res.
DBG_
IWDG_
STOP
DBG_
WWDG
_STOP
DBG_
RTC_
STOP
Res. Res. Res. Res.
DBG_
TIM7
_STO
P
DBG_
TIM6
_STO
P
DBG_
TIM5
_STO
P
DBG_
TIM4_
STOP
DBG_
TIM3_
STOP
DBG_
TIM2_
STOP
rw rw rw rw rw rw rw rw rw
Bit 31 DBG_LPTIM1_STOP: LPTIM1 counter stopped when core is halted
0: The counter clock of LPTIM1 is fed even if the core is halted
1: The counter clock of LPTIM1 is stopped when the core is halted
Bits 30:26 Reserved, must be kept at reset value.
Bit 25 DBG_CAN_STOP: bxCAN stopped when core is halted
0: Same behavior as in normal mode
1: The bxCAN receive registers are frozen
Bit 24 Reserved, must be kept at reset value.
Bit 23 DBG_I2C3_STOP: I2C3 SMBUS timeout counter stopped when core is halted
0: Same behavior as in normal mode
1: The I2C3 SMBus timeout is frozen
Bit 22 DBG_I2C2_STOP: I2C2 SMBUS timeout counter stopped when core is halted
0: Same behavior as in normal mode
1: The I2C2 SMBus timeout is frozen
Bit 21 DBG_I2C1_STOP: I2C1 SMBUS timeout counter stopped when core is halted
0: Same behavior as in normal mode
1: The I2C1 SMBus timeout is frozen
Bits 20:13 Reserved, must be kept at reset value.
Bit 12 DBG_IWDG_STOP: Independent watchdog counter stopped when core is halted
0: The independent watchdog counter clock continues even if the core is halted
1: The independent watchdog counter clock is stopped when the core is halted
Bit 11 DBG_WWDG_STOP: Window watchdog counter stopped when core is halted
0: The window watchdog counter clock continues even if the core is halted
1: The window watchdog counter clock is stopped when the core is halted
Bit 10 DBG_RTC_STOP: RTC counter stopped when core is halted
0: The clock of the RTC counter is fed even if the core is halted
1: The clock of the RTC counter is stopped when the core is halted
Bits 9:6 Reserved, must be kept at reset value.