M052LAN Nuvoton Technology Corporation of America, M052LAN Datasheet - Page 68

• Manufacturer Part Number: M052LAN
• Description: IC MCU 32BIT 8KB FLASH 48LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro M051™r

Specifications of M052LAN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 40
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

SysTick Reload Value Register （SYST_RVR）
[16]
[15:3]
[2]
[1]
[0]
Register
SYST_RVR
31
23
15
7
NuMicro M051
COUNTFLAG
Reserved
CLKSRC
TICKINT
ENABLE
Offset
SCS_BA+014 R/W
30
22
14
6
R/W
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, refer to STCLK_S.
1= Counting down to 0 will cause the SysTick exception to be pended. Clearing the
SysTick Current Value register by a register write in software will not cause SysTick
to be pended.
0= Counting down to 0 does not cause the SysTick exception to be pended. Software
can use COUNTFLAG to determine if a count to zero has occurred.
1= The counter will operate in a multi-shot manner
0= The counter is disabled
29
21
13
5
™
Description
SysTick Reload Value Register
Series Technical Reference Manual
28
20
12
RELOAD[23:16]
4
RELOAD[15:8]
RELOAD[7:0]
- 68 -
Reserved
27
19
11
3
Publication Release Date: Sep 14, 2010
26
18
10
2
25
17
9
1
Reset Value
0xXXXX_XXXX
Revision V1.2
24
16
8
0