UPMU-M3L1X-B-EK Silicon Labs, UPMU-M3L1X-B-EK Datasheet - Page 41

• Manufacturer Part Number: UPMU-M3L1X-B-EK
• Description: Daughter Cards & OEM Boards UDP SiM3L1xx MCU Card (no LCD)
• Manufacturer: Silicon Labs

Specifications of UPMU-M3L1X-B-EK

• Product: MCU Cards
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Description/function: MCU Card (No LCD) to use with UDP Motherboard
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Tool Is For Evaluation Of: SiM3L1xx
• For Use With: SiM3L1xx

4.4. Integrated LCD Controller (LCD0)
SiM3L1xx devices contain an LCD segment driver and on-chip bias generation that supports static, 2-mux, 3-mux
and 4-mux LCDs with 1/2 or 1/3 bias. The on-chip charge pump with programmable output voltage allows software
contrast control which is independent of the supply voltage. LCD timing is derived from the RTC timer clock
(RTC0TCLK) to allow precise control over the refresh rate.
The SiM3L1xx devices use registers to store the enabled/disabled state of individual LCD segments. All LCD
waveforms are generated on-chip based on the contents of these registers with flexible waveform control to reduce
power consumption wherever possible. An LCD blinking function is also supported on a subset of LCD segments.
The LCD0 module has the following features:
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Up to 40 segment pins and 4 common pins.
Supports LCDs with 1/2 or 1/3 bias.
Includes an on-chip charge pump with programmable output that allows firmware to control the contrast
independent of the supply voltage.
The RTC timer clock (RTC0TCLK) determines the LCD timing and refresh rate.
All LCD waveforms are generated on-chip based on the contents of the LCD0 registers with flexible
waveform control.
LCD segments can be placed in a discharge state for a configurable number of RTC clock cycles before
switching to the next state to reduce power consumption due to display loading.
Includes a VBAT monitor that can serve as a wakeup source for Power Mode 8.
Supports four hardware auto-contrast modes: bypass, constant, minimum, and auto-bypass.
Supports hardware blinking for up to 8 segments.
Rev 0.5
SiM3L1xx
41