EFM32G200F16 Energy Micro, EFM32G200F16 Datasheet - Page 228

• Manufacturer Part Number: EFM32G200F16
• Description: MCU 32BIT 16KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G200F16

• 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: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: 8 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

18.3.10.1 Interrupts
18.3.11 Register access
2010-09-06 - d0001_Rev1.00
Figure 18.7. LEUART - NRZ vs. RZI
If PULSEEN in LEUARTn_PULSECTRL is set while INV in LEUARTn_CTRL is cleared, the output
waveform will like RZI shown in Figure 18.7 (p. 228) , only inverted.
The width of the pulses from the pulse generator can be configured using PULSEW in
LEUARTn_PULSECTRL. The generated pulse width is PULSEW + 1 cycles of the 32.768 kHz clock,
which makes pulse width from 31.25µs to 500µs possible.
Since the incoming signal is only sampled on positive clock edges, the width of the incoming pulses
must be at least two 32.768 kHz clock periods wide for reliable detection by the LEUART receiver. They
must also be shorter than half a UART baud period.
At 2400 baud/s or lower, the pulse generator is able to generate RZI pulses compatible with the IrDA
physical layer specification. The external IrDA device must generate pulses of sufficient length for
successful two-way communication.
The interrupts generated by the LEUART are combined into one interrupt vector. If LEUART interrupts
are enabled, an interrupt will be made if one or more of the interrupt flags in LEUARTn_IF and their
corresponding bits in LEUART_IEN are set.
Since this module is a Low Energy Peripheral, and runs off a clock which is asynchronous to
the HFCORECLK, special considerations must be taken when accessing registers. Please refer to
Section 5.3 (p. 18) for a description on how to perform register accesses to Low Energy Peripherals.
NRZ
RZI
Idle
S
0
1
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3
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Stop
Idle