MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 425

IC MCU 32BIT 256KB FLASH 100LQFP

MCF51EM256CLL

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

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCF51EM256CLL
Manufacturer:
FREESCALE
Quantity:
110
Part Number:
MCF51EM256CLL
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Independent Robust Real Time Clock (IRTC)
this tamper interrupt when the MCU or application is in Service mode and simply reset the tamper
interrupt. For other conditions it will be taken as a tamper.
Tamper Condition 2: Battery removed when MCU is powered ON: The analog circuitry monitoring
the battery voltage indicates when the battery voltage is removed. This signal is used by the tamper circuit
to indicate a tamper provided MCU power in ON. A flop will be present that will be cleared by CPU during
calibration. Any change of state on this signal will be detected as a tamper.
Tamper Condition 3: Off Chip Tamper Indication:
An external pin on the MCU is also used to monitor tampering external to the MCU. For example, this pin
can be used to indicate that the energy meter unit is opened. Again a flop will be present inside IRTC that
will be cleared by CPU during calibration. High level of this pin will be detected as a tamper.
A tamper filtering circuit is connected to both tamper pins to prevent any glitches triggering the tamper
interrupt. The duration for which a tamper signal should be asserted to be indicated as tamper is
programmable by user in the IRTC control register. The filtered signals are then used to generate the
tamper status and interrupt signals.
Figure 17-30. Tamper Capture Circuit and Timing Diagram
Tamper Detection Flow:
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor
17-41

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