EFM32TG210F32 Energy Micro, EFM32TG210F32 Datasheet - Page 474

• 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

29.3.2 Multiplexing, Bias, and Wave Settings
2010-12-21 - d0034_Rev0.90
The LCD driver supports different multiplexing and bias settings, and these can be set individually in
the MUX and BIAS bits in LCD_DISPCTRL respectively, see Table 29.1 (p. 474) and Table 29.2 (p.
474) .
Note
The MUX setting determines the number of LCD COM lines that are enabled. When using octaplex or
sextaplex multiplexing, the additional COM lines used (COM4-COM7) are actually located on the SEG
(SEG20-SEG23) lines. When static multiplexing is selected, LCD output is enabled on LCD_COM0,
when duplex multiplexing is used, LCD_COM0-LCD_COM1 are used, when triplex multiplexing is
selected, LCD_COM0-LCD_COM2 are used, when quadruplex multiplexing is selected, LCD_COM0-
LCD_COM3 are used, when sextaplex multiplexing is selected, LCD_COM0-LCD_COM3 together with
SEG20-SEG21 as LCD_COM4-LCD_COM5 are used, making 22 segments available, located in SEG0-
SEG19, and SEG22-SEG23. Finally when octaplex multiplexing is selected, LCD_COM0-LCD_COM3
together with SEG20-SEG23 as LCD_COM4-LCD_COM7 are used, making the 20 segments available,
located in SEG0-SEG19.
See Section 29.3.3 (p. 475) for waveforms for the different bias and multiplexing settings.
The waveforms generated by the LCD controller can be generated in two different versions, regular
and low-power. The low power mode waveforms have a lower switching frequency than the regular
waveforms, and thus consume less power. The WAVE bit in LCD_DISPCTRL decides which waveforms
to generate. An example of a low-power waveform is shown in Figure 29.2 (p. 475) , and an example
of a regular waveform is shown in Figure 29.3 (p. 475) .
Table 29.1. LCD Mux Settings
Table 29.2. LCD BIAS Settings
MUXE
0
0
0
0
1
1
BIAS
00
01
10
11
If the MUX and BIAS settings in LCD_DISPCTRL are changed while the LCD driver is
enabled, the output waveform is unpredictable and may lead to a DC-component for one
LCD frame.
MUX
00
01
10
11
01
11
Mode
Static
Half Bias
Third Bias
Fourth Bias
Mode
Static
Duplex
Triplex
Quadruplex
Sextaplex
Octaplex
Bias setting
Static (2 levels)
1/2 Bias (3 levels)
1/3 Bias (4 levels)
1/4 Bias (5 levels)
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474
Multiplexing
Static (segments can be multiplexed with LCD_COM[0])
Duplex (segments can be multiplexed with LCD_COM[1:0])
Triplex (segments can be multiplexed with LCD_COM[2:0])
Quadruplex (segments can be multiplexed with
LCD_COM[3:0])
Sextaplex (segments can be multiplexed with LCD_COM[3:0]
and SEG[23:22])
Octaplex (segments can be multiplexed with LCD_COM[3:0])
and SEG[23:20]
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