EFM32G200F64 Energy Micro, EFM32G200F64 Datasheet - Page 253

• 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

19.3.2.7 Up/Down-count (Dual-slope) PWM
19.3.3 Dead-Time Insertion Unit (TIMER0 only)
2010-09-06 - d0001_Rev1.00
The high duty cycle is given by Equation 19.5 (p. 253)
TIMER Up-count Duty Cycle Equation
If the counter is set to up-down count and the Compare/Capture channel is put in PWM mode, dual
slope PWM output will be generated by Figure 19.19 (p. 253) .The resolution (in bits) is given by
Equation 19.6 (p. 253) .
Figure 19.19. TIMER Up/Down-count PWM Generation
TIMER Up/Down-count PWM Resolution Equation
The PWM frequency is given by Equation 19.7 (p. 253) :
TIMER Up/Down-count PWM Frequency Equation
The high duty cycle is given by Equation 19.8 (p. 253)
TIMER Up/Down-count Duty Cycle Equation
The Dead-Time Insertion Unit aims to make control of BLDC motors safer and more efficient
by introducing complementary PWM outputs with dead-time insertion and fault handling, see
Figure 19.20 (p. 253) .
Figure 19.20. TIMER Dead-Time Insertion Unit Overview
When used for motor control, the PWM outputs TIM0_CC0, TIM0_CC1 and TIM0_CC2 are often
connected to the high-side transistors of a triple half-bridge setup (UH, VH and WH), and the
TIMERn_CCx_CCV
Original PWM (TIM0_CCx_pre)
Com pare m atch
TIMERn_TOP
Buffer update
TIMn_CCx
Overflow
0
f
PWM
up/down
R
PWM
= f
DS
Dead tim e
insertion
HFPERCLK
up/down
DS
up/down
up
= log(TOP+1)/log(2)
= CCVx/TOP
= CCVx/TOP
/ ( 2^(PRESC+1) x TOP)
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253
Fault sources
handling
Fault
Com plem entary output (TIM0_CDTIx)
Prim ary output (TIM0_CCx)
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(19.5)
(19.6)
(19.7)
(19.8)