EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 105

• 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

4.3.11 Configurable Fault Status Register
4.3.11.1 Memory Management Fault Status Register
2011-02-04 - d0002_Rev1.00
3
of the exceptions, but see the Caution in this section.
If you disable a system handler and the corresponding fault occurs, the processor treats the fault as
a hard fault.
You can write to this register to change the pending or active status of system exceptions. An OS kernel
can write to the active bits to perform a context switch that changes the current exception type.
The CFSR indicates the cause of a memory management fault, bus fault, or usage fault. See the register
summary in Table 4.12 (p. 94) for its attributes. The bit assignments are:
The following subsections describe the subregisters that make up the CFSR:
• Section 4.3.11.1 (p. 105)
• Section 4.3.11.2 (p. 107)
• Section 4.3.11.3 (p. 108) .
The CFSR is byte accessible. You can access the CFSR or its subregisters as follows:
• access the complete CFSR with a word access to 0xE000ED28
• access the MMFSR with a byte access to 0xE000ED28
• access the MMFSR and BFSR with a halfword access to 0xE000ED28
• access the BFSR with a byte access to 0xE000ED29
• access the UFSR with a halfword access to 0xE000ED2A.
The flags in the MMFSR indicate the cause of memory access faults. The bit assignments are:
31
Active bits, read as 1 if the exception is active, or as 0 if it is not active. You can write to these bits to change the active status
Caution
• Software that changes the value of an active bit in this register without correct adjustment to
• After you have enabled the system handlers, if you have to change the value of a bit in this
the stacked content can cause the processor to generate a fault exception. Ensure software that
writes to this register retains and subsequently restores the current active status.
register you must use a read-modify-write procedure to ensure that you change only the required
bit.
Usage Fault Status Register
UFSR
16 15
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105
Bus Fault Status
Register
BFSR
8 7
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Mem ory Managem ent
Fault Status Register
MMFSR
0