A key application-specific feature of the 56F801 is the inclusion of a Pulse Width Modulator (PWM)
module. This modules incorporates six complementary, individually programmable PWM signal outputs
to enhance motor control functionality. Complementary operation permits programmable dead-time
insertion, and separate top and bottom output polarity control. The up-counter value is programmable to
support a continuously variable PWM frequency. Both edge- and center-aligned synchronous pulse width
control (0% to 100% modulation) are supported. The device is capable of controlling most motor types:
ACIM (AC Induction Motors), both BDC and BLDC (Brush and Brushless DC motors), SRM and VRM
(Switched and Variable Reluctance Motors), and stepper motors. The PWMs incorporate fault protection
and cycle-by-cycle current limiting with sufficient output drive capability to directly drive standard
opto-isolators. A “smoke-inhibit”, write-once protection feature for key parameters is also included. The
PWM is double-buffered and includes interrupt control to permit integral reload rates to be programmable
from 1 to 16. The PWM modules provide a reference output to synchronize the Analog-to-Digital
Converters.
The 56F801 incorporates an 8 input, 12-bit Analog-to-Digital Converter (ADC). A full set of standard
programmable peripherals is provided that include a Serial Communications Interface (SCI), a Serial
Peripheral Interface (SPI), and two Quad Timers. Any of these interfaces can be used as General-Purpose
Input/Outputs (GPIO) if that function is not required. An on-chip relaxation oscillator provides flexibility
in the choice of either on-chip or externally supplied frequency reference for chip timing operations.
Application code is used to select which source is to be used.
1.3 State of the Art Development Environment
•
Processor ExpertTM (PE) provides a Rapid Application Design (RAD) tool that combines easy-to-use
component-based software application creation with an expert knowledge system.
•
The Code Warrior Integrated Development Environment is a sophisticated tool for code navigation,
compiling, and debugging. A complete set of evaluation modules (EVMs) and development system cards
will support concurrent engineering. Together, PE, Code Warrior and EVMs create a complete, scalable
tools solution for easy, fast, and efficient development.
56F801 Technical Data, Rev. 17
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Freescale Semiconductor
FREESCALE [ Freescale ]
