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HCTL-1101 Datasheet(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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HCTL-1101 Datasheet(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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2 / 40 page  2 Description HCTL-1101 Max. Supply Current 30 mA Max. Power Dissipation 165 mW Max. Tri-State Output Leakage Current 5 µA Operating Frequency 100 kHz-2 MHz Operating Temperature Range -20°C to +85°C Storage Temperature Range -55°C to +125°C Synchronize 2 or More ICs Yes Preset Actual Position Reg- isters Yes Read Flag Register Yes LIMIT and STOP Pins Must be pulled up to VDD if not used. Hard Reset Required PLCC Package Available Yes Theory of Operations The HCTL-1101 is a general purpose motor controller which provides position and velocity control for DC, DC brushless and stepper motors. The internal block dia- gram of the HCTL-1101 is shown in Figure 1. The HCTL- 1101 receives its input commands from a host processor and position feedback from an incremental encoder with quadrature output. An 8-bit bi-directional multiplexed ad- dress/data bus interfaces the HCTL-1101 to the host pro- cessor. The encoder feedback is decoded into quadrature counts and a 24-bit counter keeps track of position. The HCTL-1101 executes any one of four control algorithms selected by the user. The four control modes are: • Position Control • Proportional Velocity Control • Trapezoidal Profile Control for point to point moves • Integral Velocity Control with continuous velocity profiling using linear acceleration. The resident Position Profile Generator calculates the nec- essary profiles for Trapezoidal Profile Control and Integral Velocity Control. The HCTL-1101 compares the desired position (or velocity) to the actual position (or veloc- ity) to compute compensated motor commands using a programmable digital filter D(z). The motor command is externally available at the Motor Command port as an 8- bit byte and at the PWM port as a Pulse Width Modulated (PWM) signal. The HCTL-1101 has the capability of providing electronic commutation for DC brushless and stepper motors. Using the encoder position information, the motor phases are enabled in the correct sequence. The commutator is fully programmable to encompass most motor/encoder com- binations. In addition, phase overlap and phase advance can be programmed to improve torque ripple and high speed performance. The HCTL-1101 contains a number of flags including two externally available flags, Profile and Initialization, which allow the user to see or check the status of the controller. It also has two emergency inputs, LIMIT and STOP, which allow operation of the HCTL-1101 to be interrupted under emergency conditions. The HCTL-1101 controller is a digitally sampled data sys- tem. While information from the host processor is accept- ed asynchronously with respect to the control functions, the motor command is computed on a discrete sample time basis. The sample timer is programmable. System Block Diagram HCTL- 1101 HOST PROCESSOR AMP M E |
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