ST STM32F102 series User Manual

RM0008 Debug support (DBG)
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For the bxCAN, the user can choose to block the update of the receive register during a
breakpoint.
For the I
2
C, the user can choose to block the SMBUS timeout during a breakpoint.
26.15.3 Debug MCU configuration register
This register allows the configuration of the MCU under DEBUG. This concerns:
● Low-power mode support
● Timer and Watchdog counters support
● bxCAN communication support
● Trace pin assignment
This DBGMCU_CR is mapped on the External PPB bus at address 0xE004 2004
It is asynchronously reset by the PORESET (and not the system reset). It can be written by
the debugger under system reset.
If the debugger host does not support these features, it is still possible for the user software
to write to these registers.
DBGMCU_CR
Address: 0xE0042004
Only 32-bit access supported
POR Reset: 0x00000000 (not reset by system reset)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
DBG_
TIM8_
STOP
DBG_
TIM7_
STOP
DBG_
TIM6_
STOP
DBG_
TIM5_
STOP
DBG_I2
C2_SM
BUS_TI
MEOUT
Res. rw rw rw rw rw
1514131211109876543210
DBG_I
2C1_S
MBUS
_TIME
OUT
DBG_
CAN_
STOP
DBG_
TIM4_
STOP
DBG_
TIM3_
STOP
DBG_
TIM2_
STOP
DBG_
TIM1_
STOP
DBG_
WWDG
_
STOP
DBG_
IWDG
STOP
TRACE_
MODE
[1:0]
TRACE
_
IOEN
Reserved
DBG_
STAND
BY
DBG_
STOP
DBG_
SLEEP
rw rw rw rw rw rw rw rw rw rw rw Res. rw rw rw
Bits 31:21 Reserved, must be kept cleared.
Bits 20:17 DBG_TIMx_STOP: TIMx counter stopped when core is halted (x=8..5)
0: The clock of the involved timer counter is fed even if the core is halted, and the outputs behave
normally.
1: The clock of the involved timer counter is stopped when the core is halted, and the outputs are
disabled (as if there were an emergency stop in response to a break event).
Bit 16 DBG_I2C2_SMBUS_TIMEOUT SMBUS timeout mode stopped when Core is halted
0: Same behavior as in normal mode.
1: The SMBUS timeout is frozen
Bit 15 DBG_I2C1_SMBUS_TIMEOUT SMBUS timeout mode stopped when Core is halted
0: Same behavior as in normal mode.
1: The SMBUS timeout is frozen.

ST STM32F102 series Specifications

General

Brand	ST
Model	STM32F102 series
Category	Microcontrollers
Language	English