27961 Parallax Inc, 27961 Datasheet - Page 4

• Manufacturer Part Number: 27961
• Description: MODULE MOTOR MIND SIP
• Manufacturer: Parallax Inc

Specifications of 27961

• Product: Microcontroller Accessories
• Operating Supply Voltage: 6 to 36 V
• Board Size: 30.48 mm x 25.4 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Motor Mind B enhanced
Data Sheet
2.0 Introduction
Motor Mind B enhanced
Serial DC Motor Controller
FEATURES
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2.1 DESCRIPTION
The Motor Mind B enhanced DC Motor Controller is capable of controlling one brushed DC motor.
Control is implemented through a TTL (logic level) serial interface.
The Motor Mind B enhanced (MMBe) is pin and functionally compatible with earlier versions of the Motor
Mind B. Care has been taken to make this new revision as close as possible to the previous version of
the Motor Mind B (MMB). Significant differences are detailed in section 3.7 of this datasheet. Physically
they me be distinguished by the lack of a heat sink on the MMBe.
Beyond the physical changes the MMBe has additional commands and functionality designed into it. A
primary improvement is the H-bridge IC used. This H-bridge has greater current handling capacity and
better protection from under-voltage, over-temperature, and over-current conditions.
communication LEDs were added to provide visual indications of functionality.
accommodates 2.4KBPS and 9.6KBPS baud rates, and can be configured to operate with a pulse-width-
modulation frequency of 15.5KHz. The previous MMB operated with software generated PWM frequency
of 61Hz, which was derived from the time-base required for tachometer measurements and serial
communication. The MMBe defaults to 15.5KHz PWM frequency but can be programmed to operate at
the much lower 242Hz to allow for backwards compatibility. New designs should use the more efficient
(and less audible 15.5KHz) frequency.
Enhanced tachometer, speed control, and count commands may be used to implement speed control or
rudimentary position control.
increment/decrement mode, or a Proportional/Integral (PI) filter may be implemented.
The board measures 1.0” x 1.2” x 0.3”, and comes in a 9-pin SIP package (0.1” spacing).
Note: In this datasheet hexadecimal values are represented by a prefix of “0x”. For example decimal 10
is represented as 0x0A.
Up to 1.75A continuous current (6A peak), 6-36VDC brush
motors
PWM frequency of 242Hz or 15.5KHz
TTL serial interface, 2.4KBPS or 9.6KBPS
Enhanced command set from earlier Motor Mind B modules
Backwards compatible with earlier Motor Mind B modules
Tiny 1.0” x 1.2” packaging, 9-pin 0.1” SIP
Under-voltage, over-temperature, over-current protection
built in
0-65,535Hz tachometer
Closed loop PI Filter speed control
Pulse counter mode of operation
User accessible EEPROM
Phone: [phone] - www.solutions-cubed.com
Motor Control System - Solutions Cubed, LLC
The SPDCON command may now be implemented in the original
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5
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9
5V
GND
TM
FM
_BRAKE
TACH_IN
MOTOR-
MOTOR+
VMOTOR
COMPONENT SIDE
The MMBe now
Solutions Cubed
Fault and
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