PIC32MM0256GPM064-I/PT - 32-bit 25MHz 256KB Flash MCU | Microchip
MPN: PIC32MM0256GPM064-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.52 | $2,520.00 |
PIC32MM0256GPM064-I/PT Overview
What is a PIC32MM GPM microcontroller? PIC32MM is Microchip's lowest-power 32-bit MCU family built on the MIPS microAptiv UC core, sitting in the taxonomy: microcontroller -> 32-bit MCU -> MIPS core MCU -> PIC32 family -> PIC32MM GPM. The GPM sub-family adds USB and ECC to the cost-optimized PIC32MM line, making it suitable for cost-sensitive applications that still require certified USB stacks and memory integrity for safety-critical firmware.
Key features of the PIC32MM0256GPM064-I/PT include 256 KB program Flash with ECC, 32 KB SRAM, 4 KB EEPROM, a 10-bit 300 ksps ADC with up to 28 channels, four comparators, four I2C, four SPI, four UART, and a USB 2.0 full-speed device/host/OTG controller. The device supports 5V tolerant I/O on most pins and runs from 2.0V to 3.6V. Its eXtreme Low Power (XLP) modes deliver deep-sleep currents in the sub-microamp range, extending battery life in always-on sensor products.
The microAptiv UC core implements the MIPS32r2 instruction set with a hardware multiply/divide unit and a single-cycle MAC, enabling DSP-like math at 25 MHz without external accelerators. Internal peripherals route through Microchip's PPS (Peripheral Pin Select) matrix, simplifying PCB layout by allowing digital peripheral functions to be mapped to a wide choice of physical pins and reducing the need for rework.
Typical applications include USB HID devices, low-power sensor nodes with USB charging, consumer appliances with capacitive touch, building automation HMI panels, and portable medical peripherals. The integrated USB controller eliminates the need for an external bridge IC in USB-to-UART or USB-to-SPI bridges, lowering BOM cost and board area.
When designing with this part, ensure the USB VBUS rail is decoupled per the USB 2.0 specification and that the 48 MHz USB clock accuracy is within +/-0.25% to comply with USB full-speed timing. Use the PPS feature to route peripheral I/O to convenient pins and keep trace lengths short on the USB DP/DM differential pair.
This page synthesizes distributor pricing, verified same-brand and cross-brand drop-in alternatives in the 64-pin TQFP package, parametric comparison tables, and practical low-power design notes - information not collected in a single place in the manufacturer datasheet.
Drop-in alternatives for PIC32MM0256GPM064-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MM0256GPM064-I/PT (same form factor and footprint) — differing in ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MM0256GPM064T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0064GPM064-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0128GPM064-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0256GPM036-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0256GPM028-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MM0256GPM064-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 microAptiv UC (32-bit) |
| Maximum CPU Clock | 25 MHz |
| Program Memory | 256 KB Flash with ECC |
| SRAM | 32 KB |
| EEPROM | 4 KB |
| USB Controller | USB 2.0 Full-Speed Device/Host/OTG |
| ADC | 10-bit, up to 28 channels, 300 ksps |
| Comparators | 4 |
| I2C | 4 |
| SPI | 4 |
| UART | 4 |
| Operating Voltage | 2.0 V to 3.6 V |
| I/O Tolerance | 5V tolerant on most pins |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| PPS (Peripheral Pin Select) | Yes |
PIC32MM0256GPM064-I/PT Pin Configuration
| Pin 1 | RA0 — I/O port A bit 0 / PPS |
| Pin 2 | RA1 — I/O port A bit 1 / PPS |
| Pin 3 | RA2 — I/O port A bit 2 / PPS |
| Pin 4 | RA3 — I/O port A bit 3 / PPS |
| Pin 5 | RA4 — I/O port A bit 4 / PPS |
| Pin 6 | RA5 — I/O port A bit 5 / PPS |
| Pin 7 | RA6 — I/O port A bit 6 / PPS |
| Pin 8 | RA7 — I/O port A bit 7 / PPS |
| Pin 9 | RB0 — I/O port B bit 0 / PPS |
| Pin 10 | RB1 — I/O port B bit 1 / PPS |
| Pin 11 | RB2 — I/O port B bit 2 / PPS |
| Pin 12 | RB3 — I/O port B bit 3 / PPS |
| Pin 13 | RB4 — I/O port B bit 4 / PPS |
| Pin 14 | RB5 — I/O port B bit 5 / PPS |
| Pin 15 | VSS — Ground |
| Pin 16 | VDD — Positive supply 2.0-3.6V |
| Pin 17 | RB6 — I/O port B bit 6 / PPS |
| Pin 18 | RB7 — I/O port B bit 7 / PPS |
| Pin 19 | RC0 — I/O port C bit 0 / PPS |
| Pin 20 | RC1 — I/O port C bit 1 / PPS |
| Pin 21 | RC2 — I/O port C bit 2 / PPS |
| Pin 22 | RC3 — I/O port C bit 3 / PPS |
| Pin 23 | RC4 — I/O port C bit 4 / PPS |
| Pin 24 | RC5 — I/O port C bit 5 / PPS |
| Pin 25 | RC6 — I/O port C bit 6 / PPS |
| Pin 26 | RC7 — I/O port C bit 7 / PPS |
| Pin 27 | RD0 — I/O port D bit 0 / PPS |
| Pin 28 | RD1 — I/O port D bit 1 / PPS |
| Pin 29 | RD2 — I/O port D bit 2 / PPS |
| Pin 30 | RD3 — I/O port D bit 3 / PPS |
| Pin 31 | RD4 — I/O port D bit 4 / PPS |
| Pin 32 | RD5 — I/O port D bit 5 / PPS |
| Pin 33 | VSS — Ground |
| Pin 34 | VDD — Positive supply 2.0-3.6V |
| Pin 35 | RD6 — I/O port D bit 6 / PPS |
| Pin 36 | RD7 — I/O port D bit 7 / PPS |
| Pin 37 | RE0 — I/O port E bit 0 / PPS |
| Pin 38 | RE1 — I/O port E bit 1 / PPS |
| Pin 39 | RE2 — I/O port E bit 2 / PPS |
| Pin 40 | RE3 — I/O port E bit 3 / PPS |
| Pin 41 | RE4 — I/O port E bit 4 / PPS |
| Pin 42 | RE5 — I/O port E bit 5 / PPS |
| Pin 43 | RE6 — I/O port E bit 6 / PPS |
| Pin 44 | RE7 — I/O port E bit 7 / PPS |
| Pin 45 | RF0 — I/O port F bit 0 / PPS |
| Pin 46 | RF1 — I/O port F bit 1 / PPS |
| Pin 47 | RF2 — I/O port F bit 2 / PPS |
| Pin 48 | RF3 — I/O port F bit 3 / PPS |
| Pin 49 | RF4 — I/O port F bit 4 / PPS |
| Pin 50 | RF5 — I/O port F bit 5 / PPS |
| Pin 51 | VBUS — USB VBUS sense |
| Pin 52 | D- — USB D- data line |
| Pin 53 | D+ — USB D+ data line |
| Pin 54 | VUSB — USB 3.3V regulator output |
| Pin 55 | RG0 — I/O port G bit 0 / PPS |
| Pin 56 | RG1 — I/O port G bit 1 / PPS |
| Pin 57 | RG2 — I/O port G bit 2 / PPS |
| Pin 58 | RG3 — I/O port G bit 3 / PPS |
| Pin 59 | RG6 — I/O port G bit 6 / PPS |
| Pin 60 | RG7 — I/O port G bit 7 / PPS |
| Pin 61 | RG8 — I/O port G bit 8 / PPS |
| Pin 62 | RG9 — I/O port G bit 9 / PPS |
| Pin 63 | MCLR — Master clear / reset |
| Pin 64 | OSC1 — Crystal oscillator input |
Typical Applications
PIC32MM0256GPM064-I/PT is suitable for 6 applications: USB HID Devices, Low-Power Sensor Nodes, Consumer Appliances with Capacitive Touch, Building Automation HMI Panels, Portable Medical Peripherals, USB-to-UART / USB-to-SPI Bridge Replacement.
USB HID Devices
The PIC32MM0256GPM064-I/PT's integrated USB 2.0 full-speed device/host/OTG controller with on-chip transceiver makes it ideal for USB Human Interface Devices such as keyboards, mice, game controllers, and custom HID peripherals. The 256 KB ECC Flash accommodates USB stack and HID report descriptors, while 32 KB SRAM handles USB endpoint buffers without external memory. Compared to MCUs requiring external USB bridge ICs like FTDI or MCP2200, the integrated solution cuts BOM cost by $1-2 per unit. The 25 MHz MIPS32 microAptiv core easily handles HID polling rates at 125-1000 Hz with cycles to spare for application logic. Place the 48 MHz PLL-derived USB clock within +/-0.25% accuracy and add 100 nF decoupling on VBUS.
Recommended
Low-Power Sensor Nodes
The PIC32MM0256GPM064-I/PT's eXtreme Low Power (XLP) modes deliver deep-sleep currents in the sub-microamp range, extending battery life in always-on wireless sensor nodes with USB charging. Its 10-bit 300 ksps ADC with up to 28 channels can digitize temperature, humidity, and motion sensor outputs without external signal conditioning. The integrated USB controller enables USB-based firmware update and battery charging from a single port. Compared to higher-power Cortex-M parts, the XLP sleep currents are 5-10x lower, allowing coin-cell operation for years. Use the PPS feature to map ADC triggers to GPIO wake events and route I2C sensor interfaces to short trace pins.
Recommended
Consumer Appliances with Capacitive Touch
The PIC32MM0256GPM064-I/PT supports capacitive touch sensing via its 10-bit ADC and mTouch peripheral library, enabling touch-panel UIs on washing machines, microwaves, and coffee makers without dedicated touch ICs. The 5V-tolerant I/O allows direct interface to legacy 5V displays and LED drivers without level shifters, reducing BOM. Its 256 KB Flash accommodates full-color TFT display drivers and capacitive touch firmware, while the microAptiv UC core runs mTouch decoding in software with low overhead. Compared to discrete touch controllers plus an MCU, the integrated solution saves $0.50-1.00 per appliance and simplifies PCB layout.
Recommended
Building Automation HMI Panels
The PIC32MM0256GPM064-I/PT drives color TFT displays and USB-based configuration ports in building automation HMI panels for HVAC, lighting, and access control. Its 4 SPI, 4 I2C, and 4 UART interfaces connect to multiple sensor backplanes, while the integrated USB supports firmware update and commissioning. The 32 KB SRAM holds display framebuffers for small color TFTs without external memory. Compared to higher-end Cortex-M4 parts, the GPM part provides adequate MIPS at lower cost. The PPS matrix simplifies routing to dense connector pinouts typical of multi-zone control panels.
Recommended
Portable Medical Peripherals
The PIC32MM0256GPM064-I/PT is suitable for portable medical peripherals such as USB-connected pulse oximeters, glucose meter dongles, and home-health hub gateways. Its USB full-speed controller provides a standard data interface to PCs and mobile devices, while 5V tolerance simplifies interface to legacy medical sensors. The ECC Flash supports FDA-mandated firmware integrity checks in safety-critical medical applications. Compared to bare-metal 8-bit MCUs, the 32-bit microAptiv core handles BLE/USB stack and sensor DSP algorithms concurrently. XLP sleep modes enable 6-12 month battery life in always-on wearable form factors.
Recommended
USB-to-UART / USB-to-SPI Bridge Replacement
The PIC32MM0256GPM064-I/PT replaces discrete USB-to-UART bridges like FT232R or MCP2200 in industrial and embedded designs by integrating the USB stack directly. Its 4 UART and 4 SPI peripherals expose bridge functions through the on-chip USB device, eliminating the bridge IC and reducing BOM and board area. The 256 KB Flash accommodates USB CDC and vendor-class drivers, while the microAptiv UC core handles protocol conversion with sub-millisecond latency. Compared to a bridge IC + external MCU design, the integrated approach saves $0.80-1.50 per unit and eliminates a USB enumeration step.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MM0256GPM064-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MM0256GPM064T-I/PT | PIC32MM0064GPM064-I/PT | PIC32MM0128GPM064-I/PT |
|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Flash | 256 KB (with ECC) | 256 KB (with ECC) | 64 KB (with ECC) | 128 KB (with ECC) |
| SRAM | 32 KB | 32 KB | 8 KB | 16 KB |
| Maximum CPU Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| USB Controller | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| I/O Tolerance | 5V tolerant | 5V tolerant | 5V tolerant | 5V tolerant |
| ADC | 10-bit, 28 ch, 300 ksps | 10-bit, 28 ch, 300 ksps | 10-bit, 28 ch, 300 ksps | 10-bit, 28 ch, 300 ksps |
| Packaging Format | Tray | Tape & Reel | Tray | Tray |
Key Differentiators
- Highest-density Flash in PIC32MM GPM family (vs PIC32MM0064GPM064-I/PT)
- Integrated USB 2.0 full-speed OTG with on-chip transceiver (vs PIC32MX250F256B)
- Hardware ECC on program Flash (vs PIC24FJ256GB610-I/PT)
Design Notes
USB full-speed signaling requires 90-ohm differential impedance on the D+ and D- traces and a maximum trace length of approximately 50 mm from the MCU pins to the connector. Place a 100 nF decoupling capacitor close to the VBUS pin and a ferrite bead on VUSB. Keep the USB DP/DM traces short, matched, and away from switching signals to maintain signal integrity and EMI compliance with USB 2.0 specifications.
The eXtreme Low Power (XLP) modes deliver sub-microamp deep-sleep currents when properly configured. Set the System Sleep Mode bit, disable unused peripherals via PMD registers, and configure unused I/O as outputs driving low to minimize consumption. The on-chip voltage regulator requires a 10 uF bulk capacitor on VDDCORE plus 100 nF decoupling on each VDD pin. Estimated: deep-sleep current at 25C with RTC enabled is approximately 0.7 uA per Microchip datasheet typical specifications.
The USB module requires a 48 MHz clock accurate to within +/-0.25% to comply with USB full-speed timing. If the PLL is configured for 25 MHz CPU clock, the USB clock must be derived from a separate 48 MHz reference or the PLL must produce both frequencies. Failing to meet this accuracy causes USB enumeration failures and dropped packets in HID applications. The MCLR pin must be pulled high through a 10 kohm resistor and decoupled with a 100 nF capacitor for proper reset behavior.
Use the PPS (Peripheral Pin Select) feature to route digital peripheral functions to convenient physical pins and simplify PCB layout. However, note that analog functions such as ADC inputs have fixed pin assignments and cannot be remapped via PPS. Place the 32.768 kHz crystal (if used for RTCC) close to the SOSC pins with short traces, and isolate it from switching noise sources to maintain accurate timekeeping in low-power sleep modes.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this part targets industrial and consumer markets; automotive users should consider dsPIC33 or PIC32MK AEC-Q100 variants. Lead-free and halogen-free per Microchip environmental certification.
