MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 545

• 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

24.4.4
This section describes the LCD charge pump, voltage divider, and LCD power supply configuration
options.
The LCD bias voltages (V
divider network that is connected using the CPSEL bit. The input source to the LCD charge pump is
controlled by the VSUPPLY[1:0] bit field.
VSUPPLY[1:0] indicates the state of internal signals used to configure power switches as shown in the
table in
for the LCD module including configuration of the LCD module power supply source using V
external supply on the V
Upon Reset the VSUPPLY[1:0] bits are configured to connect V
changed to match the application requirements before the LCD module is enabled.
Freescale Semiconductor
Figure
Figure 24-15
LCD Charge Pump, Voltage Divider, and Power Supply Operation
BRATE[2:0]
LCD Clock
32.768 khz
39.063 khz
24-15. The block diagram in
30 khz
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
provides a block diagram for the LCD charge pump and the resistor divider network.
LL3
LL1
. V
, V
7.32
9.54
LL3
0
8
Table 24-20. Blink Frequency Calculations
(
LL2
Blink Rate = LCD Clock(Hz) ÷ Blink Divider)
should never exceed V
and V
3.66
4.77
1
4
LL3
Figure 24-15
) can be generated by the LCD charge pump or a resistor
1.831
2.38
2
2
Blink Frequency (Hz)
.916
1.19
3
1
illustrates several potential operational modes
DD
.
LL3
.46
.6
.5
4
to V
DD
.23
.25
.30
5
. This configuration should be
.11
.13
.15
6
.075
LCD Driver Module
.06
.06
7
DD
,or an
24-29