Microchip Technology MA320013

Overview

MA320013 from Microchip Technology is a 44-pin TQFP Plug-In Module (PIM) designed exclusively for the PIC32 Bluetooth Audio Development Board, integrating the PIC32MX270F256D 32-bit microcontroller with on-board MCP23008 I²C I/O expander to maintain full functionality of the 100-pin target device. It supports USB 2.0 Full-Speed device interface, dual UARTs, I²S audio interfaces (BCLK, LRCL, MCLK, SDO), SPI2, and 5 push-button/LED control paths.

For engineers reviewing the MA320013 datasheet, MA320013 pinout, MA320013 application, or MA320013 equivalent, this module enables rapid evaluation of Bluetooth audio system integration using PIC32MX1XX/2XX MCUs-particularly where compact prototyping, I²S-based DAC/ADC interfacing, and USB audio class compliance are required.

Technical Context

The MA320013 implements a fixed hardware mapping between the 44-pin PIM footprint and the 100-pin TQFP package of the PIC32MX270F256D, preserving critical audio timing signals including I²S1_BCLK (RB14), I²S1_LRCL (RB4), I²S1_MCLK (RC1), and I²S1_SDO (RA9). It routes UART1/UART2, USB D+/D−, and oscillator inputs (OSC1/OSC2) directly without translation.

An integrated MCP23008 I²C port expander (slave address configurable as 0x20h or 0x22h) provides 8 GPIOs for LED control (GP0–GP4), USB select logic (GP5/GP6), and GPIO_32 (GP7), decoupling board-level I/O from MCU pin constraints while maintaining compatibility with the development kit's firmware abstraction layer.

Key Specifications

Availability

MA320013 is available at Aetrix Electronics and suitable for Bluetooth audio prototyping, embedded voice interface development, and I²S-based digital audio subsystem validation requiring stable component supply and documented pin-compatibility with Microchip's official development ecosystem.

Supply support for MA320013 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and development tools for embedded applications.

The MA320013 belongs to Microchip's PIC32MX Bluetooth Audio PIM product line, engineered specifically to accelerate evaluation and firmware development for audio-centric applications using the PIC32MX1XX/2XX family.

FAQ

What is the primary function of the MA320013?

The MA320013 is a plug-in module that adapts the 100-pin PIC32MX270F256D microcontroller into a 44-pin TQFP form factor for use with Microchip's PIC32 Bluetooth Audio Development Board. It preserves all essential audio, USB, and communication interfaces-including I²S, UART, USB D+/D−, and oscillator signals-while adding an MCP23008 I²C expander for LED and control logic. The MA320013 enables compact, socket-based evaluation without redesigning the host board.

Can the MA320013 be used outside the PIC32 Bluetooth Audio Development Board?

No-the MA320013 is explicitly designed for and mechanically/electrically compatible only with the PIC32 Bluetooth Audio Development Board. Its pinout, power routing, and I²C expander configuration assume the board's 100-pin socket layout, USB PHY termination, and clock distribution. Using MA320013 on other platforms would require custom carrier hardware and firmware adaptation, and is not supported by Microchip documentation or design files.

Does the MA320013 include its own oscillator circuit?

The MA320013 does not integrate an oscillator; it exposes the PIC32MX270F256D's OSC1 and OSC2 pins (RA2/RA3) to external 8 MHz crystal connections per Figure 2. The module relies on the host development board to provide the crystal, load capacitors, and biasing. No internal RC oscillator or clock generator is present on the MA320013 itself.

How is the MCP23008 I²C expander configured on the MA320013?

The MCP23008 on the MA320013 is pre-configured with address-select pins A0–A2 set to enable two possible slave addresses: 0x20h and 0x22h. GP0–GP4 drive LEDs 1–5, GP5/GP6 control USB_SEL0/S and USB_SEL1/OE_N, and GP7 maps to GPIO_32. All expander I/Os are accessible via dedicated PIM pins (e.g., GP0 → PIM pin 60), and no jumpers or solder bridges are required to activate default functionality.

Is the MA320013 RoHS compliant and lead-free?

Yes-the MA320013 conforms to Microchip's standard RoHS-compliant, lead-free manufacturing process. The underlying PIC32MX270F256D-50I/PT variant (as shown in Figure 2) is specified with Pb-free (RoHS) finish and green molding compound. Full compliance documentation, including material declarations and test reports, is available through Microchip's quality portal under part number MA320013.