MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 426

• 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

Independent Robust Real Time Clock (IRTC)
Description:
17-42
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POR asserts tamper status bits in register space (in IRTC_TTSR_SEC) and tamper interrupt status
bit (in IRTC_ISR)
Tamper Interrupt Enable bit is also asserted on POR and an interrupt to CPU is indicated
When CPU acknowledges the tamper interrupt by writing 1’b1 to the tamper interrupt status bit,
the interrupt is de-asserted and tamper status bits are cleared.
Any tamper signal asserted externally (battery disconnected or tamper detected) are filtered in the
tamper block.
Tamper signal is asserted when the filter counter matches the programmed filter duration.
Based on the type of tamper detected the appropriate status (10 for battery disconnected or 01 for
external tamper) is captured in the tamper status register (IRTC_TTSR_SEC).
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Figure 17-31. Tamper Detection Flow Diagram
Freescale Semiconductor