EFM32TG210F32 Energy Micro, EFM32TG210F32 Datasheet - Page 108

• Manufacturer Part Number: EFM32TG210F32
• Description: MCU 32BIT 32KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Tiny Geckor

Specifications of EFM32TG210F32

• 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: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: EFM32
• Core: ARM Cortex-M3
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: UART, I2C, SPI
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 1
• Operating Supply Voltage: 1.8 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Processor To Be Evaluated: EFM32TG210
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

11.5.4 CMU_HFRCOCTRL - HFRCO Control Register
31:17
16:12
11
10:8
7:0
Bit
Offset
0x00C
Reset
Access
Name
Bit
2010-12-21 - d0034_Rev0.90
Reserved
SUDELAY
Always write this field to 0.
Reserved
BAND
Write this field to set the frequency band in which the HFRCO is to operate. When changing this setting there will be no glitches on
the HFRCO output, hence it is safe to change this setting even while the system is running on the HFRCO. To ensure an accurate
frequency, the HFTUNING value should also be written when changing the frequency band. The calibrated tuning value for the
different bands can be read from the Device Information page.
TUNING
Writing this field adjusts the HFRCO frequency (the higher value, the higher frequency). This field is updated with the production
calibrated value for the 14 MHz band during reset, and the reset value might therefore vary between devices.
Name
Name
Value
0
1
2
3
4
5
6
7
8
9
Value
0
1
2
3
4
5
Mode
HFCLK
HFCLK2
HFCLK4
HFCLK8
HFCLK16
HFCLK32
HFCLK64
HFCLK128
HFCLK256
HFCLK512
Mode
1MHZ
7MHZ
11MHZ
14MHZ
21MHZ
28MHZ
0x00
0x3
0x80
Reset
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
Access
Access
Description
HFPERCLK = HFCLK
HFPERCLK = HFCLK/2
HFPERCLK = HFCLK/4
HFPERCLK = HFCLK/8
HFPERCLK = HFCLK/16
HFPERCLK = HFCLK/32
HFPERCLK = HFCLK/64
HFPERCLK = HFCLK/128
HFPERCLK = HFCLK/256
HFPERCLK = HFCLK/512
Description
1 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
7 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
11 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
14 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
21 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
28 MHz. NOTE: Also set the TUNING value (bits 7:0) when changing band.
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108
Bit Position
HFRCO Start-up Delay
HFRCO Band Select
HFRCO Tuning Value
Description
Description
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