PXD10 Product Brief, Rev. 1

Features

Freescale Semiconductor

12

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On-chip generation of all output voltage levels

— LCD voltage reference taken from main 5V supply

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LCD RAM

— Contains the data to be displayed on the LCD

— Data can be read from or written to the display RAM at any time

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End of Frame interrupt

— Optimizes the refresh of the data without visual artefact

— Provides selectable number of frames between each interrupt

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Contrast adjustment using programmable internal voltage reference

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Remapping capability of 4 or 6 backplanes with frontplanes

— Increase pin selection flexibility

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In low power modes, the LCD operation can be suspended under software control. The LCD can

also operate in low power modes, clocked by the internal 128 kHz IRC or external 32 KHz crystal

oscillator

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Selectable output current boost during transitions

2.4.6

Stepper Motor Controller (SMC)

The SMC module is a PWM motor controller suitable to drive loads requiring a PWM signal. The motor

controller has twelve PWM channels associated with two pins each (24 pins in total).

The SMC module includes the following features:

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10/11-bit PWM counter

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11-bit resolution with selectable PWM dithering function

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Left, right, or center aligned PWM

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Output slew rate control

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Output Short Circuit Detection

This module is suited for, but not limited to, driving small stepper and air core motors used in

instrumentation applications. This module can be used for other motor control or PWM applications that

match the frequency, resolution, and output drive capabilities of the module.

2.4.7

Stepper Stall Detector (SSD)

The stepper stall detector (SSD) module provides a circuit to measure and integrate the induced voltage

on the non-driven coil of a stepper motor using full steps when the gauge pointer is returning to zero (RTZ).

The SSD module features the following:

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Programmable full step state

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Programmable integration polarity

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Blanking (recirculation) state

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16-bit integration accumulator register