EFM32G890F64 Energy Micro, EFM32G890F64 Datasheet - Page 420

• Manufacturer Part Number: EFM32G890F64
• Description: MCU 32BIT 64KB FLASH 112-BGA
• Manufacturer: Energy Micro
• Series: Geckor

Specifications of EFM32G890F64

• 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, LCD, POR, PWM, WDT
• Number Of I /o: 90
• 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 8x12b, D/A 2x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LFBGA
• Processor Series: EFM32G890
• 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: 90
• Number Of Timers: 3
• 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

2010-09-06 - d0001_Rev1.00
Figure 29.27. LCD 1/3 Bias and Triplex Multiplexing - LCD_COM2
1/3 bias and triplex multiplexing - LCD_SEG0
The LCD_SEG0 waveform illustrates how different segment waveforms can be multiplexed with the
COM lines in order to turn on and off LCD pixels. As illustrated in the figures below, this waveform will
turn ON pixels connected to LCD_COM1, while pixels connected to LCD_COM0 and LCD_COM2 will
be turned OFF.
Figure 29.28. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0
Figure 29.29. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0 Connection
1/3 bias and triplex multiplexing - LCD_SEG0-LCD_COM0
• DC voltage = 0 (over one frame)
• V
• The LCD display pixel that is connected to LCD_SEG0 and LCD_COM0 will be OFF with this waveform
Figure 29.30. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0-LCD_COM0
1/3 bias and triplex multiplexing - LCD_SEG0-LCD_COM1
• DC voltage = 0 (over one frame)
• V
com 0
com 1
com 2
RMS
RMS
-V
-V
V
V
V
V
V
V
LC1
LC2
LC1
LC2
LC1
LC2
LC2
LC1
= 0.33 V
= 0.64 × V
-V
V
V
V
V
V
V
LC0
(2/3V
LC0
(2/3V
(1/3V
(1/3V
LC0
(2/3V
(1/3V
(1/3V
(2/3V
LC0
LC3
LC3
LC3
Fram e Start
Fram e Start
(V
(V
(V
(V
(V
(V
(V
Fram e Start
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
SS
SS
SS
LCD_OUT
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
LCD_OUT
Fram e End
Fram e End
Fram e End
...the world's most energy friendly microcontrollers
420
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