SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 190

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

11.22 System timer, SysTick
Table 11-33. System timer registers summary
1.
190
190
Address
0xE000E010
0xE000E014
0xE000E018
0xE000E01C
SysTick calibration value.
SAM3X/A
SAM3X/A
Name
CTRL
LOAD
VAL
CALIB
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 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.
The system timer registers are:
Type
RW
RW
RW
RO
Required
privilege
Privileged
Privileged
Privileged
Privileged
Reset
value
0x00000004
0x00000000
0x00000000
0x0002904
(1)
Description
“SysTick Control and Status Register” on page 191
“SysTick Reload Value Register” on page 192
“SysTick Current Value Register” on page 193
“SysTick Calibration Value Register” on page 194
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12