ATSAMG51G18 SysTick registers

The 4 registers of SysTick (System timer), from 0xE000E010, with their reset value and every field. The ATSAMG51G18 has 569 registers in 26 peripherals, one page each.

SysTick System timer

CSRSysTick Control and Status Register

Address
0xE000E010
Reset
0x00000004
Access
read/write
Size
32-bit
4 fields
FieldBitsWhat it does
COUNTFLAG16no description available
CLKSOURCE2no description available
  • 0 external clock
  • 1 processor clock
TICKINT1no description available
  • 0 counting down to 0 does not assert the SysTick exception request
  • 1 counting down to 0 asserts the SysTick exception request
ENABLE0no description available
  • 0 counter disabled
  • 1 counter enabled

RVRSysTick Reload Value Register

Address
0xE000E014
Reset
0x00000000
Access
read/write
Size
32-bit
1 field
FieldBitsWhat it does
RELOAD23:0Value to load into the SysTick Current Value Register when the counter reaches 0

CVRSysTick Current Value Register

Address
0xE000E018
Reset
0x00000000
Access
read/write
Size
32-bit
1 field
FieldBitsWhat it does
CURRENT23:0Current value at the time the register is accessed

CALIBSysTick Calibration Value Register

Address
0xE000E01C
Reset
0x00000000
Access
read/write
Size
32-bit
3 fields
FieldBitsWhat it does
SKEW30no description available
  • 0 10ms calibration value is exact
  • 1 10ms calibration value is inexact, because of the clock frequency
TENMS23:0Reload value to use for 10ms timing
NOREF31no description available
  • 0 The reference clock is provided
  • 1 The reference clock is not provided