MCF51EM256CLK Freescale Semiconductor, MCF51EM256CLK Datasheet - Page 555

• Manufacturer Part Number: MCF51EM256CLK
• Description: IC MCU 32BIT 256KB FLASH 80LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLK

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 56
• 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 12x16b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-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

Chapter 25
Programmable Reference Analog Comparator (PRACMP)
25.1
The PRACMP is a CMOS comparator with a programmable reference input. The comparator has up to
eight input pins, each of them can be compared with any input pins.There is also a internal programmable
reference generator which divides the V
Output of this reference generator can be one of the eight inputs of comparator. The comparator circuit is
designed to operate across the full range of the supply voltage (rail-to-rail operation).
25.1.1
PRACMP features include:
Freescale Semiconductor
•
•
•
•
On-chip programmable reference generator output (1/32 V
selected from external Vdd and internal regulated Vdd)
Typically 5 mV of input offset
Less than 40 μA in enable mode and less than 1 nA in disable mode (excluding programmable
reference generator)
Fixed ACMP hysteresis which is from 3 mV to 20 mV
Introduction
Features
The PRACMP output can be connected internally to the SCI Rx input for
infra-red reception implementation. For further information please refer to
Figure 2-4
(SIMIPS2).”
The PRACMP register PRACMPxC2 has no effect in MCF51EMxx
devices. For details to enable the PRACMP pins, refer to
Mux
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Controls.”
External input 0
External input 1
External input 2
External input 3
External input 4
External input 5
External input 6
PRACMP Internal Connection
and
Section 7.7.16, “Internal Peripheral Select Register 2
Table 25-1. PRACMP Pins Mapping
In
into 32 levels, the V
NOTE
In
can be selected from two external sources.
PRACMPxP0
PRACMPxP1
PRACMPxP2
PRACMPxP3
PRACMPxP4
in
Pins
to V
V
V
ss
ss
Section 4.7, “Pin
in
, step is 1/32 V
in
, V
in
can be
25-1