Freescale Semiconductor Eval, Demo and Development Board for MCF51MM256 TWR-MCF51MM TWR-MCF51MM 数据表

Freescale Semiconductor
Data Sheet: Technical Data

Document Number: MCF51MM256

Rev. 5, 07/2012

© Freescale Semiconductor, Inc., 2009-2012. All rights reserved.

• Up to 50.33 MHz ColdFire CPU above 2.4 V and 40 MHz CPU 

above 2.1V and 20 MHz CPU above 1.8 V across temperature 
range of -40°C to 105°C.

• ColdFire Instruction Set Revision C (ISA_C).
• 32-bit multiply and accumulate (MAC) supports signed or  

unsigned integer or signed fractional inputs.

• 256 K Flash comprised of two independent 128 K flash arrays; 

read/program/erase over full operating voltage and temperature; 
allows interrupt processing while programming.

• 32 KB System Random-access memory (RAM).
• Security circuitry to prevent unauthorized access to RAM and  

Flash contents.

• Two ultra-low power stop modes. Peripheral clock enable register 

can disable clocks to unused modules to reduce currents.

• Time of Day (TOD) — Ultra low-power 1/4 sec counter with up to 

64 sec timeout.

• Ultra-low power external oscillator that can be used in stop modes to 

provide accurate clock source to the TOD. 6 µs typical wake up 
time from stop3 mode.

• Oscillator (XOSC1) — Loop-control Pierce oscillator; 32.768 kHz 

crystal 
or ceramic resonator dedicated for TOD operation.

• Oscillator (XOSC2) for high frequency crystal input for MCG 

reference to be used for system clock and USB operations.

• Multipurpose Clock Generator (MCG) — PLL and FLL; precision

trimming of internal reference allows 0.2% resolution and typical 
+0.5%
to -1% deviation over temperature and voltage; supports CPU 
frequencies from 4 kHz to 50 MHz.

• Watchdog computer operating properly (COP) reset with option to 

run from dedicated 1 kHz internal clock source or bus clock.

• Low-voltage detection with reset or interrupt; selectable trip points; 

separate low voltage warning with optional interrupt; selectable  

trip points.

• Illegal opcode and illegal address detection with reset.
• Flash block protection for each array to prevent accidental write / 

erasure.

• Hardware CRC to support fast cyclic redundancy checks.

• Integrated ColdFire DEBUG_Rev_B+ interface with single wire  

BDM connection supports same electrical interface used by the 

S08 family debug modules.

• Real-time debug with 6 hardware breakpoints (4 PC, 1 address 

and 1 data).

• On-chip trace buffer provides programmable start/stop 

recording conditions.

• USB — Dual-role USB On-The-Go (OTG) device, supports USB in 

either device, host or OTG configuration. On-chip transceiver and 3.3V 
regulator help save system cost, fully compliant with USB Specification 

2.0. Allows control, bulk, interrupt and isochronous transfers.

• SCIx — Two serial communications interfaces with optional 13-bit 

break; option to connect Rx input to PRACMP output on SCI1 and 
SCI2; High current drive on Tx on SCI1 and SCI2; wake-up from 
stop3 on Rx edge.

• SPI1 — Serial peripheral interface with 32-bit FIFO buffer; 16-bit or 

8-bit data transfers; full-duplex or single-wire bidirectional; 
double-buffered transmit and receive; master or slave mode; 
MSB-first or LSB-first shifting.

• SPI2 — Serial peripheral interface with full-duplex or single-wire 

bidirectional; Double-buffered transmit and receive; Master or Slave 
mode; MSB-first or LSB-first shifting.

• IIC — Up to 100 kbps with maximum bus loading; Multi-master 

operation; Programmable slave address; Interrupt driven 
byte-by-byte data transfer; supports broadcast mode and 11-bit 
addressing.

• CMT — Carrier Modulator timer for remote control communications. 

Carrier generator, modulator and driver for dedicated infrared out 
(IRO). Can be used as an output compare timer.

• TPMx — Two 4-channel Timer/PWM Module; Selectable input 

capture, output compare, or buffered edge- or center-aligned PWM 
on each channel; external clock input/pulse accumulator.

• Mini-FlexBus — Multi-function external bus interface with user 

programmable chip selects and the option to multiplex address and 
data lines.

• PRACMP — Analog comparator with selectable interrupt; compare 

option to programmable internal reference voltage; operation in 
stop3.

• ADC16 — 16-bit successive approximation ADC with up to 4 

dedicated differential channels and 8 single-ended channels; range 
compare function; 1.7 mV/×C temperature sensor; internal bandgap 
reference channel; operation in stop3; fully functional from 3.6 V to 
1.8 V, Configurable hardware trigger for 8 Channel select and result 
registers.

• PDB — Programmable delay block with 16-bit counter and modulus 

and prescale to set reference clock to bus divided by 1 to bus divided 
by 2048; 8 trigger outputs for ADC module provides periodic 
coordination of ADC sampling sequence with sequence completion 
interrupt; Back-to-Back mode and Timed mode.

• DAC — 12-bit resolution DAC; configurable settling time.
• OPAMPx — 2 flexible operational amplifiers configurable for general 

operations; Low offset and temperature drift.

• TRIAMPx — 2 trans-impedance amplifiers dedicated for converting 

current inputs into voltages.

• Up to 68 GPIOs and 1 output-only pin.
• Voltage Reference output (VREFO). 
• Dedicated infrared output pin (IRO)with high current sink capability.
• Up to 16 KBI pins with selectable polarity.
• Up to 16 pins of rapid general purpose I/O 

(RGPIO).

The MCF51MM256 series devices are members of the 
low-cost, low-power, high-performance ColdFire V1 family of 
32-bit microcontrollers (MCUs) designed for handheld metering 
devices.
Not all features are available in all devices or packages; see 

 for a comparison of features by device.

80-LQFP
12mm x 12mm

81-BGA
10mm x 10mm

100-LQFP
14mm x 14mm

104-BGA
10mm x 10mm

Document Number: MCF51MM256

Rev. 5, 07/2012