MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 544

• Manufacturer Part Number: MCF51EM256CLL
• Description: IC MCU 32BIT 256KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLL

• 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: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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: DEMOEM
• 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
24.4.3.1
The blink mode is used as a means of alternating among different LCD display modes at a defined
frequency. The LCD module can be configured to implement two blink modes. The BMODE bit in the
LCD-blink-control register (LCDBCTL) configures the different blink modes. Blink modes are activated
by setting the BLINK bit in the LCDBCTL register. If BLINK = 0, the LCD module operates normally as
described
operation. During a blink, the display data driven by the LCD module changes to the mode selected by the
BMODE bit. The BMODE bit selects two different blink modes, blank and alternate modes operate in the
same way, as defined in
between display modes and blink modes. If the LCD duty cycle is five backplanes or greater, BMODE =
1 is ignored and will revert to create a blank display during the blink period.
24.4.3.2
The LCD clock is the basis for the calculation of the LCD module blink frequency. The LCD module blink
frequency is equal to the LCD clock (LCDCLK) divided by the factor selected by the BRATE[2:0] bits.
Table 24-20
common LCDCLK selections.
24-28
Section 24.4.3, “LCD Display
shows LCD module blink frequency calculations for all values of BRATE[2:0] at a few
LCD Blink Modes
Blink Frequency
BLANK
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
0
0
0
0
1
1
0
1
Duty
1/3
1/4
Table 24-18. Alternate Display Backplane Sequence (continued)
Section 24.4.3, “LCD Display
ALT
X
X
X
X
0
0
1
1
Backplane Sequence
Table 24-19. Display Mode Interaction
A B C D
BMODE
A B C
Modes”. If BLINK = 1, BMODE bit configures the blinking
0
1
0
1
0
1
X
X
LCD Duty
1-4
1-4
1-4
1-4
1-4
1-4
5-8
5-8
Modes.” The table below shows the interaction
Alt. Backplane Sequence
Alternate Display Alternate display
Alternate display
Normal Period
Normal Display
Normal Display
Normal Display
Blank Display
Blank Display
Blank Display
E F G H
E F G
BLINK = 1
Alternate display
Alternate display
Blank DIsplay
Blank Display
Blank Display
Blank Display
Blank Display
Blink Period
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