MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 550

• 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
24.4.4.2.1
When VSUPPLY[1:0] = 11, powersw1, powersw2, are deasserted. V
module internally, so the LCD module requires an external power source for V
the charge pump is disabled.
If the charge pump is enabled, external power must be applied to V
pump will generate the other LCD bias voltages V
Internal V
If the charge pump is enabled the internal regulated voltage, V
LCD bias voltages.In this state external voltage source should not be connected to V
controlled by the LCD regulated voltage control (LCDRVC) register. The figure above,
shows that V
V
output as V
V
be approximately 5 V.
The HREFSEL bit in the LCDSUPPLY register is used to set V
shown in
voltage.The trim can be used to increase or decrease the regulated voltage by 1.5% for each count. A total
of ±12% of change can be done to the regulated
V
24-34
LL1
LCDON.
LL1
V
glass operation.
The HREFSEL bit is used to select
1.0 or 1.67 V range for V
IREG
, V
is connected to the internal charge pump.Using the charge pump, the value of V
LL2
LCD Operational State
is connected to V
HREFSEL = 0
For 3-V LCD glass, V
HREFSEL =1
Table
HREFSELL
IREG
LL3.
, and V
IREG
LCD External Power Supply, VSUPPLY[1:0] = 11
V
24-23.The LCDRVC contains trim bits that can be used to make changes to the regulated
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
LL3
Table 24-23. LCD bias Voltages VLL1, VLL2, and VLL3 based on V
is connected to V
LL3
, an LCD bias voltage, is equal to the voltage required to energize the LCD panel,
values based on the value of V
LL1
IREG
for 3 V
Table 24-22. LCD Power Supply Configuration
1.67 V
V
LL3
1.0 V
IREG
For 3 V glass operation HREFSEL= 0, V
V
V
Charge pump is used to generate V
IREG
LCD
should be approximately 3 V; while for 5-V LCD glass, V
LL1
is not connected.
is connected V
when the RVEN bit is set.
LCD Power Supply Configuration
voltage.Table 24-23
V
LL1
1.67 V
1.0 V
LL1
LL1
= V
IREG
internally.
and V
ref
.
LL2.
IREG
LL2
IREG
V
LL3
, can be used as an input to generate the
and V
LL2
IREG
shows the selected LCD bias voltages
DD
to approximately 1.0 V or 1.67 V as
3.33 V
. With this configuration, the charge
2.0 V
= 2 × V
= 1 V.
LL3
is not available to power the LCD
.
ref
LL1,
V
IREG
11
V
Freescale Semiconductor
LL1
LL2,
LL3
LL1
0
. V
3.0 V
5.0 V
Figure
= 3 × V
and V
is tripled and
IREG
X
LL3
ref
LL3
24-15,
1
is
should
when
1