NUC120RE3AN Nuvoton Technology Corporation of America, NUC120RE3AN Datasheet - Page 156
NUC120RE3AN
Manufacturer Part Number
NUC120RE3AN
Description
IC MCU 32BIT 128KB FLASH 64LQFP
Manufacturer
Nuvoton Technology Corporation of America
Series
NuMicro™r
Specifications of NUC120RE3AN
Core Processor
ARM Cortex-M0
Core Size
32-Bit
Speed
50MHz
Connectivity
EBI/EMI, I²C, IrDA, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, I²S, LVD, POR, PS2, PWM, WDT
Number Of I /o
45
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
2.5 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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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
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