MCF51CN128 ColdFire Microcontroller Data Sheet, Rev. 4

Freescale Semiconductor

2

includes precision trimming of internal reference, allowing 0.2% resolution and 2% deviation over temperature and

voltage. PLL derives a higher accuracy clock source derived by an external reference

• System Protection

– 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

– Illegal opcode and illegal address detection with programmable reset or exception response

– Flash block protection

• Development Support

– Single-wire background debug module (BDM) interface; supports same electrical interface used by the S08, 9S12, and

9S12x families debug modules

– 4 PC plus 2 address (optional data) breakpoint registers with programmable 1- or 2-level trigger response

– 64-entry processor status and debug data trace buffer with programmable start/stop conditions

• Peripherals

– ADC—Up to 12 channel, 12-bit resolution; 2.5

μs conversion time; automatic 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

– SCI—Three modules with optional 13-bit break

– SPI—Two interfaces with full-duplex or single-wire bi-directional; double-buffered transmit and receive; master or slave

mode; MSB-first or LSB-first shifting

– IIC—Two IICs with up to 100 kbps with maxmimum bus loading; multi-master operation; programmable slave address;

interrupt-driven byte-by-byte data transfer; supports broadcast mode and 11-bit addressing

– TPM—Two 3-channel, 16-bit resolution modules; selectable input capture, output compare, or buffered edge- or

center-aligned PWM on each channel

– RTC—8-bit modulus counter with binary- or decimal-based prescaler; external clock source for precise time base,

time-of-day, calendar- or task-scheduling functions; free-running on-chip low-power oscillator (1 kHz) for cyclic wake-up

without external components; runs in all MCU modes

– MTIM—Two 8-bit resolution modulo timers with 8-bit prescaler

• Input/Output

– Up to 70 general-purpose input/output (GPIO) pins, all with pin mux controls to select alternate functions

– 16 keyboard interrupt (KBI) pins with selectable polarity

– Hysteresis and configurable pull-up device or input filtering on all input pins; configurable slew rate and drive strength on

all output pins

– 16 Rapid GPIO pins connected to the CPU’s high-speed local bus with set, clear, and toggle functionality (PTD and PTF)