EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 101

• Manufacturer Part Number: EFM32G200F64
• Description: MCU 32BIT 64KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G200F64

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.8 V
• Data Converters: A/D 4x12b, D/A 1x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad
• Processor Series: EFM32G200
• Core: ARM Cortex-M3
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, UART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

11.5.2 CMU_HFCORECLKDIV - High Frequency Core Clock Division
Register
10:9
8
7
6:5
4
3:2
1:0
Bit
Offset
0x004
Reset
Access
Name
2010-09-06 - d0001_Rev1.00
HFXOTIMEOUT
Configures the start-up delay for HFXO.
Reserved
HFXOGLITCHDETEN
This bit enables the glitch detector which is active as long as the start-up ripple-counter is counting. A detected glitch will reset the
ripple-counter effectively increasing the start-up time. Once the ripple-counter has timed-out, glitches will not be detected.
HFXOBUFCUR
This value has been set during calibration and should not be changed.
Reserved
HFXOBOOST
Used to adjust start-up boost current for HFXO.
HFXOMODE
Set this to configure the external source for the HFXO. The oscillator setting takes effect when 1 is written to HFXOEN in
CMU_OSCENCMD. The oscillator setting is reset to default when 1 is written to HFXODIS in CMU_OSCENCMD.
Name
Value
0
1
2
Value
0
1
2
3
Value
0
1
2
3
Value
0
1
2
Mode
XTAL
BUFEXTCLK
DIGEXTCLK
Mode
8CYCLES
256CYCLES
1KCYCLES
16KCYCLES
Mode
50PCENT
70PCENT
80PCENT
100PCENT
Mode
XTAL
BUFEXTCLK
DIGEXTCLK
0x3
0
0x1
0x3
0x0
Reset
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
RW
RW
RW
RW
RW
Access
Description
32.768 kHz crystal oscillator
An AC coupled buffer is coupled in series with LFXTAL_N pin, suitable for external
sinus wave (32.768 kHz).
Digital external clock on LFXTAL_N pin. Oscillator is effectively bypassed.
Description
Timeout period of 8 cycles
Timeout period of 256 cycles
Timeout period of 1024 cycles
Timeout period of 16384 cycles
Description
50 %
70 %
80 %
100 % (default)
Description
4-32 MHz crystal oscillator
An AC coupled buffer is coupled in series with HFXTAL_N, suitable for external sine
wave (4-32 MHz)
Digital external clock on HFXTAL_N pin. Oscillator is effectively bypassed.
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101
Bit Position
HFXO Timeout
HFXO Glitch Detector Enable
HFXO Boost Buffer Current
HFXO Start-up Boost Current
HFXO Mode
Description
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