NUMICRO-SDK Nuvoton Technology Corporation of America, NUMICRO-SDK Datasheet - Page 156

• Manufacturer Part Number: NUMICRO-SDK
• Description: KIT EVAUATION NUC100/120/130/140
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r
• Type: MCUr

Specifications of NUMICRO-SDK

• Contents: Board, Cable, CD, Nu-Link
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: NUC100, NUC120, NUC130, NUC140

5.2.6.2
SysTick Control and Status （SYST_CSR）
Register
SYST_CSR
Bits
[31:17]
[16]
[15:3]
[2]
[1]
[0]
31
23
15
System Timer Control Register Description
7
NuMicro™ NUC100 Series Technical Reference Manual
Offset
SCS_BA+0x10
Descriptions
Reserved
COUNTFLAG
Reserved
CLKSRC
TICKINT
ENABLE
30
22
14
6
Reserved
R/W
R/W
Reserved
Returns 1 if timer counted to 0 since last time this register was read.
COUNTFLAG is set by a count transition from 1 to 0.
COUNTFLAG is cleared on read or by a write to the Current Value register.
Reserved
1 = Core clock used for SysTick.
0 = Clock source is (optional) external reference clock
1 = Counting down to 0 will cause the SysTick exception to be pended. Clearing the
0 = Counting down to 0 does not cause the SysTick exception to be pended. Software
1 = The counter will operate in a multi-shot manner
0 = The counter is disabled
29
21
13
5
SysTick Current Value register by a register write in software will not cause SysTick to
be pended.
can use COUNTFLAG to determine if a count to zero has occurred.
Description
SysTick Control and Status Register
Reserved
28
20
12
- 156 -
4
Reserved
Reserved
27
19
11
3
Publication Release Date: Dec. 22, 2010
CLKSRC
26
18
10
2
TICKINT
25
17
9
1
Revision V1.06
Reset Value
0x0000_0000
COUNTFLAG
ENABLE
24
16
8
0