MCF51EM128CLL Freescale Semiconductor, MCF51EM128CLL Datasheet - Page 534

• Manufacturer Part Number: MCF51EM128CLL
• Description: IC MCU 32BIT 128KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM128CLL

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Processor Series: MCF51EM
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: RS-232, LIN
• Maximum Clock Frequency: 50 MHz
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: TWR-MCF51CN-KIT, TWR-SER, TWR-ELEV, TOWER
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

LCD Driver Module
The LCD module also provides an LCD pin enable control. Setting the LCD pin enable bit (PEN[x] in the
LCDPEN[y] register) for a particular LCD[y] pin enables the LCD module functionality of that pin once
the LCDEN bit is set. When the BPEN[x] bit in the LCDBPEN[y] is set, the associated pin operates as a
backplane. The LCDWF registers can then activate (display) the corresponding LCD segments on an LCD
panel.
The LCDWF registers control the on/off state for the segments controlled by the LCD pins defined as front
planes and the active phase for the backplanes. Blank display modes do not use the data from the LCDWF
registers. When using the LCDWF register for frontplane operation, writing a 0 turns the segment off.
For pins enabled as backplane, the phase of the backplane (A-H) is assigned by the LCDWF register for
the corresponding backplane pin.
24.4.1
The LCD module driver has 8 modes of operation:
All modes are 1/3 bias. These modes of operation are described in more detail in the following sections.
24.4.1.1
The denominator of the duty cycle indicates the number of LCD panel segments capable of being driven
by each individual frontplane output driver. Depending on the duty cycle, the LCD waveform drive can be
categorized as static or multiplexed.
In static-driving method, the LCD is driven with two square waveforms. The static-driving method is the
most basic method to drive an LCD panel, but because each frontplane driver can drive only one LCD
segment, static driving limits the LCD segments that can be driven with a given number of frontplane pins.
In static mode, only one backplane is required.
In multiplexed mode, the LCD waveforms are multi-level and depend on the bias mode. Multiplex mode,
depending on the number of backplanes, can drive multiple LCD segments with a single frontplane driver.
24-18
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Duty cycle (number of backplanes)
Backplane assignment (which LCD[43:0] pins operate as backplanes)
Frame frequency interrupt enable
Blinking frequency and options
Power-supply configurations
1/1 duty (1 backplane) (Phase A), 1/3 bias (4 voltage levels)
1/2 duty (2 backplanes) (Phase A, B), 1/3 bias (4 voltage levels)
1/3 duty (3 backplanes) (Phase A, B, C), 1/3 bias (4 voltage levels)
1/4 duty (4 backplanes) (Phase A, B, C, D), 1/3 bias (4 voltage levels)
1/5 duty (5 backplanes) (Phase A, B, C, D, E), 1/3 bias (4 voltage levels)
1/6 duty (6 backplanes) (Phase A, B, C, D, E, F), 1/3 bias (4 voltage levels)
1/7 duty (7 backplanes) (Phase A, B, C, D, E, F, G), 1/3 bias (4 voltage levels)
1/8 duty (8 backplanes) (Phase A, B, C, D, E, F, G, H), 1/3 bias (4 voltage levels)
LCD Driver Description
LCD Duty Cycle
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor