MCF52110 查看數據表（PDF） - Freescale Semiconductor

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MCF52110

ColdFire Microcontroller

Freescale Semiconductor 

MCF52110 Family Configurations

1.2.14 Real-Time Clock (RTC)

The Real-Time Clock (RTC) module maintains the system (time-of-day) clock and provides stopwatch, alarm, and interrupt

functions. It includes full clock features: seconds, minutes, hours, days and supports a host of time-of-day interrupt functions

along with an alarm interrupt.

1.2.15 Pulse-Width Modulation (PWM) Timers

The MCF52110 has an 8-channel, 8-bit PWM timer. Each channel has a programmable period and duty cycle as well as a

dedicated counter. Each of the modulators can create independent continuous waveforms with software-selectable duty rates

from 0% to 100%. The timer supports PCM mode, which results in superior signal quality when compared to that of a

conventional PWM. The PWM outputs have programmable polarity, and can be programmed as left aligned outputs or center

aligned outputs. For higher period and duty cycle resolution, each pair of adjacent channels ([7:6], [5:4], [3:2], and [1:0]) can

be concatenated to form a single 16-bit channel. The module can, therefore, be configured to support 8/0, 6/1, 4/2, 2/3, or 0/4

8-/16-bit channels.

1.2.16 Software Watchdog Timer

The watchdog timer is a 32-bit timer that facilitates recovery from runaway code. The watchdog counter is a free-running

down-counter that generates a reset on underflow. To prevent a reset, software must periodically restart the countdown.

1.2.17 Backup Watchdog Timer

The backup watchdog timer is an independent 16-bit timer that, like the software watchdog timer, facilitates recovery from

runaway code. This timer is a free-running down-counter that generates a reset on underflow. To prevent a reset, software must

periodically restart the countdown. The backup watchdog timer can be clocked by either the relaxation oscillator or the system

clock.

1.2.18 Phase-Locked Loop (PLL)

The clock module contains a crystal oscillator, 8 MHz on-chip relaxation oscillator (OCO), phase-locked loop (PLL), reduced

frequency divider (RFD), low-power divider status/control registers, and control logic. To improve noise immunity, the PLL,

crystal oscillator, and relaxation oscillator have their own power supply inputs: VDDPLL and VSSPLL. All other circuits are

powered by the normal supply pins, VDD and VSS.

1.2.19 Interrupt Controller (INTC)

The MCF52110 has a single interrupt controller that supports up to 63 interrupt sources. There are 56 programmable sources,

49 of which are assigned to unique peripheral interrupt requests. The remaining seven sources are unassigned and may be used

for software interrupt requests.

1.2.20 DMA Controller

The direct memory access (DMA) controller provides an efficient way to move blocks of data with minimal processor

intervention. It has four channels that allow byte, word, longword, or 16-byte burst line transfers. These transfers are triggered

by software explicitly setting a DCRn[START] bit or by the occurrence of certain UART or DMA timer events.

MCF52110 ColdFire Microcontroller, Rev. 0

Freescale Semiconductor

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