EFM32G200F16 Energy Micro, EFM32G200F16 Datasheet - Page 425

• 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

29.3.5 V
2010-09-06 - d0001_Rev1.00
Table 29.6. LCD Principle of Contrast Adjustment for Different Bias Settings.
R0 = R1 = R2 in the figure, while Rx is adjusted by changing the CONLEV bits.
By default, the LCD driver runs on main external power (V
An internal boost circuit can be enabled by setting VBOOSTEN in CMU_LCDCTRL and selecting the
boosted voltage by setting VLCDSEL in LCD_DISPCTRL. This will boosts V
be selected in the range of 3.0 V – 3.6 V by configuring VBLEV in LCD_DISPCTRL. Note that the boost
circuit is not designed to operate with the selected boost voltage, V
circuit can boost the V
When using the voltage booster, the LCD_BEXT pin must be connected through a 1 µF capacitor to
VSS, and the LCD_BCAP_P and LCD_BCAP_N pins must be connected to each other through a 22
nF capacitor.
It is also possible to connect a dedicated power supply to the LCD module. The LCD external power
supply must be connected to the LCD_BEXT pin and VLCDSEL in LCD_DISPCTRL must be set. In this
mode, the voltage booster should be disabled.
Table 29.7. LCD V
1/3 bias
1/2 bias
Static
VLCDSEL
0
1
LCD
Selection
Mode
VDD
VBOOST
LCD
LCD
up to 3.6 V when V
Rx
R0
R1
R2
Rx
R0
R1
Rx
R0
relative to V
Contrast adjustment
(CONCONF = 0)
V
V
V
LCD
LCD
LCD
V
V
V
V
V
V
V
V
V
LC0
LC1
LC2
LC3
LC0
LC1
LC3
LC0
LC3
DD
V
V
V
LCD_OUT
(V
LCD_OUT
LCD_OUT
V
V
Voltage booster/External V
LCD
LCD
DD
DD
(same as main external power)
)
...the world's most energy friendly microcontrollers
is as low as 2.0 V.
425
R0
R1
R2
R0
R1
R0
Rx
Rx
Rx
Contrast adjustment
(CONCONF = 1)
relative to GND
V
V
V
LCD
LCD
LCD
LCD
V
V
V
V
V
V
V
V
V
LC0
LC1
LC2
LC3
LC0
LC1
LC3
LC0
LC3
DD
= V
V
V
V
BOOST
LCD_OUT
LCD_OUT
LCD_OUT
DD
, smaller than V
), see Table 29.7 (p. 425) .
LCD
www.energymicro.com
No contrast adjustment
to V
R0
R1
R2
R0
R1
V
(CONLEV = 11111)
LCD
BOOST
V
V
V
LC0
LC3
V
LCD
LCD
V
V
V
V
V
V
V
V
DD
LC0
LC1
LC2
LC3
LC0
LC1
LC3
. V
LCD_OUT
. The boost
BOOST
V
V
LCD_OUT
LCD_OUT
can