SONIX SN32F264 - System Tick Timer Current Value Register (SYSTICK_VAL); System Tick Timer Calibration Value Register (SYSTICK_CALIB)

SN32F260 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD Page 25 Version 1.5
2.2.3.3 System Tick Timer Current Value register (SYSTICK_VAL)
Address: 0xE000 E018 (Refer to Cortex-M0 Spec)
Bit
Name
Description
Attribute
Reset
31:24
Reserved
R
0
23:0
CURRENT
Reading this register returns the current value of the System Tick counter.
Writing any value clears the System Tick counter and the COUNTFLAG
bit in SYSTICK_CTRL.
R/W
0x7E7F35
2.2.3.4 System Tick Timer Calibration Value register (SYSTICK_CALIB)
Address: 0xE000 E01C (Refer to Cortex-M0 Spec)
Bit
Name
Description
Attribute
Reset
31
NOREF
Indicates the reference clock to M0 is provided or not.
1: No reference clock provided.
R
1
30
SKEW
Indicates whether the TENMS value is exact, an inexact TENMS value
can affect the suitability of SysTick as a software real time clock.
0: TENMS value is exact
1: TENMS value is inexact, or not given.
R
0
29:24
Reserved
R
0
23:0
TENMS
Reload value for 10ms timing, subject to system clock skew errors. If the
value reads as zero, the calibration value is not known.
R/W
0xA71FF