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MC1401A Arkusz danych(PDF) 4 Page - List of Unclassifed Manufacturers |
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4 / 70 page 4 Electrical Characteristics Overview The MC1231A consists of two 68 pin PLCC's both fabricated in CMOS. The Peripheral Input/Output IC (I/O chip) is responsible for interfacing to the host processor and to the position input encoders. The Command Processor IC (CP chip) is responsible for all host command, trajectory, servo, and commutation computations, as well as for outputting the PWM and DAC signals. The following figure shows a typical system block diagram, along with the pin connections between the I/O chip and the CP chip. Encoder (1-2 axis) Host Processor CP I/O Data4-11 I/OAddr0-3 I/OWrite I/OCntrl0-3 ClkOut Amplifier (1-2 axis) Motor (4 axis) Hall Sensors (1 - 2 axis) The CP and I/O chips function together as one integrated motion processor. The major components connected to the chip set are the Encoder (2, or 1 axes), (optionally) the motor Hall-sensors (2 or 1 axes), the motor amplifier (2, or 1 axes), and the host processor. The encoder signals are input to the I/O chip in quadrature format. Two signals encode the position, and an optional index signal contains a once-per-rotation locating signal. Hall sensors may be connected to the chipset to provide phase initialization information, although this is not required. Three Hall sensor signals are input per axis. The chipset's motor output signals are connected to the motor amplifier. Two types of output are provided; PWM (pulse width modulation), and DAC-compatible signals used with an external DAC (digital to analog converter). Because the output signals are commutated, more than one motor output signal will be output per axis. See Theory of Operations section on sinusoidal motor commutation for details. The host processor is interfaced via an 8-bit bi-directional bus and various control signals. Host communication is coordinated by a ready/busy signal, which indicates when communication is allowed. Interconnections between the two chips consist of a data bus and various control and synchronization signals. The following table summarizes the signals that must be interconnected for the chipset to function properly. For each listed signal the I/O chip pin on the left side of the table is directly connected to the pin to the right. I/O Chip Signal Name I/O Chip Pin CP Chip Signal Name CP Chip Pin CPData4 18 Data4 50 CPData5 5 Data5 49 CPData6 6 Data6 46 CPData7 7 Data7 43 CPData8 8 Data8 40 CPData9 17 Data8 39 CPData10 3 Data10 36 CPData11 1 Data11 35 CPAddr0 68 I/OAddr0 28 CPAddr1 27 I/OAddr1 9 CPAddr2 29 I/OAddr2 6 CPAddr3 12 I/OAddr3 5 CPCntr0 20 I/OCntr0 16 CPCntr1 36 I/OCntr1 18 CPCntr2 22 I/OCntr2 68 CPCntr3 63 I/OCntr3 67 CPWrite 2 I/OWrite 15 CPClk 46 ClkOut 19 For a complete description of all pins see the 'Pin Descriptions' section of this manual. Absolute Maximum Ratings Unless otherwise stated, all electrical specifications are for both the I/O and CP chips. Storage Temperature, Ts.....................-55 deg. C to +150 deg. C Supply Voltage, Vcc.............................-0.3 V to +7.0 V Power Dissipation, Pd..........................650 mW (I/O and CP combined) Operating Ratings Operating Temperature, Ta .................0 deg. C to +70 deg. C Nominal Clock Frequency, Fclk ...........25.0 Mhz Supply Voltage, Vcc.............................4.75 V to 5.25 V * Industrial and Military operating ranges also available. Contact your PMD representative for more information. |
Podobny numer części - MC1401A |
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Podobny opis - MC1401A |
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