Overview
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 67
• In low-power modes, 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
• Selectable output current boost during transitions
1.5.27 Stepper Motor Controller (SMC)
The SMC module is a PWM motor controller suitable to drive instruments in a cluster configuration or any
other 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:
• 10/11-bit PWM counter
• 11-bit resolution with selectable PWM dithering function
• Left-, right-, or center-aligned PWM
• Output slew rate control
• 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.
1.5.28 Stepper Stall Detect (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:
• Programmable full step state
• Programmable integration polarity
• Blanking (recirculation) state
• 16-bit integration accumulator register
• 16-bit modulus down counter with interrupt
1.5.29 Sound Generation Logic (SGL)
The SGL has two modes of operation:
• Amplitude-modulated PWM mode for low-cost buzzers using any two eMIOS channels:
— Monophonic signal with amplitude control
— 8-bit amplitude resolution
— Ability to mix any two eMIOS channels
— Requires simple external RC lowpass filter
• Digital sample mode for higher quality sound using one eMIOS channel and eDMA
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