Systick Timer (Stk); Table 53. System Timer Registers Summary - ST STM32F4 Series Programming Manual

PM0214
4.5

SysTick timer (STK)

The processor has a 24-bit system timer, SysTick, that counts down from the reload value to
zero, reloads (wraps to) the value in the STK_LOAD register on the next clock edge, then
counts down on subsequent clocks.
When the processor is halted for debugging the counter does not decrement.
Address Name
0xE000E010 STK_CTRL RW
0xE000E014 STK_LOAD RW
0xE000E018 STK_VAL
0xE000E01C STK_CALIB RO

Table 53. System timer registers summary

Required
Type Reset value
privilege
Privileged 0x00000000
Privileged Unknown
RW Privileged Unknown
Privileged 0xC0000000
DocID022708 Rev 6
Description
SysTick control and status register (STK_CTRL)
on page 246
SysTick reload value register (STK_LOAD) on
page 247
SysTick current value register (STK_VAL) on
page 248
SysTick calibration value register (STK_CALIB)
on page 249
Core peripherals
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