M052LAN Nuvoton Technology Corporation of America, M052LAN Datasheet - Page 123

• 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: -

Clock Source Select Control Register 0 （CLKSEL0）
NuMicro M051
Register
CLKSEL0
Bits
[31:6]
[5:3]
[2:0]
31
23
15
7
Reserved
[1]
Offset
CLK_BA + 10 R/W
Descriptions
Reserved
STCLK_S
HCLK_S
30
22
14
6
R/W
Reserved
MCU Cortex_M0 SysTick clock source select.
This bit is the protected bit. It means programming this needs to write “59h”, “16h”, “88h” to
address 0x5000_0100 to disable register protection. Reference the register REGWRPROT
at address GCR_BA+0x100.
000 = Clock source from external crystal clock (4 ~ 24MHz)
001 = Reserved
010 = Clock source from external crystal clock/2 (4 ~ 24MHz)
011 = Clock source from HCLK/2
1xx = Clock source from internal 22.1184 MHz oscillator clock/2
HCLK clock source select.
Note:
1.
™
29
21
13
5
Series Technical Reference Manual
Before clock switching, the related clock sources (both pre-select and new-select)
must be turn on
Description
Clock Source Select Control Register 0
STCLK_S
28
20
12
4
- 123 -
Reserved
Reserved
Reserved
27
19
11
3
Publication Release Date: Sept 14, 2010
26
18
10
2
HCLK_S
25
17
9
1
0xFFFF_FFFX
Reset Value
Revision V1.2
24
16
8
0
[2]