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MCC 152 Voltage Output and DIO DAQ HAT for Raspberry Pi Features Two 12-bit simultaneous voltage outputs 5 mA output drive, sourcing 0.8 V/s slew rate Eight bidirectional digital bits 5V / 3.3V operation CMOS input thresholds Programmable input polarity Screw terminal connections Stack up to eight MCC HATs The MCC 152 is a 12-bit analog voltage output and digital input/output DAQ HAT. The onto a single Raspberry Pi MCC 152 is shown here connected to a Raspberry Pi (not included). Software Overview MCC DAQ HAT Library available on GitHub The MCC 152 is a voltage output and digital input/output HAT (Hardware Attached on Top) designed for use with Raspberry Pi, the most popular single-board com- Supported Operating Systems puter on the market today. Linux /Raspbian A HAT is an add-on board with a 40W GPIO (general purpose input/output) con- nector that conforms to the Raspberry Pi HAT specification. Programming API The MCC 152 HAT provides two analog outputs and eight digital I/O bits. Up to C, C++, Python eight MCC HATs can be stacked onto one Raspberry Pi. With CMOS input thresh- olds, selectable voltage operation, and 5 V tolerance for the digital inputs, the digital channels support both 3.3 V and 5 V logic types. Raspberry Pi Interface Analog Voltage Output Power The MCC 152 header plugs into the 40-pin The MCC 152 provides two 12-bit analog Power is provided by the Raspberry Pi general purpose I/O (GPIO) connector on a outputs with a 0 V to 5 V output range through the GPIO header connector. user-supplied Raspberry Pi. The MCC 152 and 5 mA output drive, sourcing. Both was tested for use with all Raspberry Pi outputs can be updated simultaneously MCC DAQ HAT Library models with the 40-pin GPIO connector. with software. The open-source MCC DAQ HAT Library of commands in C/C++ and Python HAT configuration Digital I/O allows users to develop applications on HAT configuration parameters are stored The MCC 152 provides eight bidirectional the Raspberry Pi using Linux. in an on-board EEPROM that allows the digital bits. The library is available to download from Raspberry Pi to automatically set up the Each digital bit is configurable for pull-up GitHub. Comprehensive API and hard- GPIO pins when the HAT is connected. or pull-down, or can be disabled. Each ware documentation is available. output bit can source 10 mA and sink The MCC DAQ HAT Library supports Stackable HATs 25 mA. operation with multiple MCC DAQ HATs Up to eight MCC HAT boards can be Users can configure the software to gener- running concurrently. stacked onto a single Raspberry Pi. Users ate an interrupt when the state of a digital can mix and match MCC HAT models Console-based example programs are input bit changes. in the stack. available for each API. The MCC 152 can interface with 3.3 V or 5 V logic types the voltage is selectable with an onboard jumper. The input polarity is software program- mable for normal (active high, default) or inverted logic (active low). Measurement ComputingMeasurement Computing (508) 946-5100(508) 946-5100 info mccdaq.cominfo mccdaq.com mccdaq.commccdaq.com 11MCC 152 Block Diagram and Example Programs 5.25 V boost DC-DC Analog Outputs 2 Dual 12-bit DAC SPI SPI Board Address I2C I2C Raspberry Pi Matching Header Digital I/O I/O 8 Expander HAT EEPROM Interrupt VIO W3 jumper 5V/3.3V MCC DAQ HAT Examples The MCC DAQ HAT Library includes console-based example programs developed in C/C++ and Python that users can run to become familiar with the library and the MCC 152. Each example includes a description and a list of the functions demonstrated in the program. An example is shown here. Users can verify MCC 152 functionality out-of-the-box by run- ning the MCC 152 App from the MCC DAQ HAT Manager utility program. This utility requires the Raspbian desktop interface, and is accessible from the Applications menu. Ready-to-run examples are included with the DAQ HAT library Stackable Connect up to eight MCC DAQ HATs onto a single Raspberry Pi. Onboard jumpers identify each board in the stack. Measurement Computing (508) 946-5100 info mccdaq.com mccdaq.com 2 Screw Terminals