Ameba-D User Manual
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44
23:0
CURRENT
R/W
0
Reading this filed returns the current value of the SysTick counter. Writing any value.
5.3.4
SYST_CALIB
Name
: System Timer Calibration Value Register
Size
: 32 bits
Address offset
: 0x01C
Read/write access
: read-only
This register is read-only and its value is provided by the value of the SYST_CALIB register in the system configuration (SYSCON) block.
31
30
29
28
27
26
25
24
23
22
21
…
2
1
0
NOREF
SKEW
RSVD
TENMS
R
R
R
Bit
Name
Access
Reset
Description
31
NOREF
R
0
Indicates whether an external reference clock is available. This bit is loaded from the
SYST_CALIB register in SYSCON.
0: A separate reference clock is available.
1: A separate reference clock is not available.
30
SKEW
R
0
Indicates whether the TENMS value generates a precise 10 millisecond time, or an 0
approximation. This bit is loaded from the SYST_CALIB register in SYSCON.
0: The value of TENMS is considered to be precise.
1: The value of TENMS is not considered to be precise.
29:24
RSVD
N/A
-
Reserved. Read value is undefined, only zero should be written.
23:0
TENMS
R
0
This field is loaded 0 from the SYST_CALIB register in SYSCON, and always RAZ/WI (read
as zero, write ignored).
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2019-05-15 10:08:03