PXS20PB Datasheet, PDF (23/30 Pages) Freescale Semiconductor, Inc – 32-bit Power Architecture® Microcontrollers for Highly Reliable

— Equals peripheral clock divided by 2 for external event counting
— Equals peripheral clock for internal clock counting
• Cascadeable counters
• Programmable count modulo
• Quadrature decode capabilities
• Counters can share available input pins
• Count once or repeatedly
• Preloadable counters
• Pins available as GPIO when timer functionality not in use
• DMA support
Features
2.5.32 Sine Wave Generator (SWG)
A digital-to-analog converter is available to generate a sine wave based on 32 stored values for external
devices (ex: resolver).
• Frequency range from 1 kHz to 50 kHz
• Sine wave amplitude from 0.47 V to 2.26 V
2.5.33 Analog-to-Digital Converter Module (ADC)
The ADC module features include:
Analog part:
• 2 on-chip ADCs
— 12-bit resolution SAR architecture
— A/D Channels: 9 external, 3 internal and 4 shared with other A/D (total 16 channels)
— One channel dedicated to each T-sensor to enable temperature reading during application
— Separated reference for each ADC
— Shared analog supply voltage for both ADCs
— One sample and hold unit per ADC
— Adjustable sampling and conversion time
Digital part:
• 4 analog watchdogs comparing ADC results against predefined levels (low, high, range) before
results are stored in the appropriate ADC result location
• 2 modes of operation: Motor Control Mode or Regular Mode
• Regular mode features
— Register based interface with the CPU: one result register per channel
— ADC state machine managing three request flows: regular command, hardware injected
command, software injected command
— Selectable priority between software and hardware injected commands
PXS20 Product Brief, Rev. 1
Freescale Semiconductor
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