mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 20

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Device Overview
1.2.2
Table 1-3
1-4
CF1 Core (V1 ColdFire core)
BDM (background debug module)
DBG (debug)
VBUS (debug visibility bus)
SIM (system integration module)
Flash (flash memory)
RAM (random-access memory)
RGPIO (rapid general-purpose input/output)
VREG (voltage regulator)
COP (computer operating properly)
LVD (low-voltage detect)
CF1_INTC (interrupt controller)
ADC (analog-to-digital converter)
FTM1, FTM2 (flexible timer/pulse-width
modulators)
TPM3 (timer/pulse-width modulator)
CRC (cyclic redundancy check)
ACMP1, ACMP2 (analog comparators)
IIC (inter-integrated circuit)
KBI (keyboard interrupt)
MCG (multipurpose clock generator)
OSC (crystal oscillator)
CAN (controller area network)
SCI1, SCI2 (serial communications interfaces)
SPI1 (8-bit serial peripheral interfaces)
SPI2 (16-bit serial peripheral interfaces)
describes the functional units of the MCF51AC256 series microcontrollers.
Functional Units
Functional Unit
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Table 1-3. MCF51AC256 Series Functional Units
Executes programs and interrupt handlers
Provides single pin debugging interface (part of the V1 ColdFire core)
Provides debugging and emulation capabilities (part of the V1 ColdFire
core)
Allows for real-time program traces (part of the V1 ColdFire core)
Controls resets and chip level interfaces between modules
Provides storage for program code, constants and variables
Provides storage for program variables
Allows for I/O port access at CPU clock speeds
Controls power management across the device
Monitors a countdown timer and generates a reset if the timer is not
regularly reset by the software
Monitors internal and external supply voltage levels, and generates a reset
or interrupt when the voltages are too low
Controls and prioritizes all device interrupts
Measures analog voltages at up to 12 bits of resolution
Provides a variety of timing-based features
Provides a variety of timing-based features
Accelerates computation of CRC values for ranges of memory
Compares two analog inputs
Supports standard IIC communications protocol
Provides pin interrupt capabilities
Provides clocking options for the device, including a phase-locked loop
(PLL) and frequency-locked loop (FLL) for multiplying slower reference
clock sources
Allows a crystal or ceramic resonator to be used as the system clock source
or reference clock for the PLL or FLL
Supports standard CAN communications protocol
Serial communications UARTs capable of supporting RS-232 and LIN
protocols
Provides 8-bit 4-pin synchronous serial interface
Provides 16-bit 4-pin synchronous serial interface with FIFO
Function
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