PIC18F6585-I/PT
PIC18F6585-I/PT - 8-Bit 40MHz 48KB Flash MCU TQFP-64 | Microchip
The Microchip Technology PIC18F6585-I/PT is a high-performance 8-bit CMOS Flash microcontroller from the PIC18 family, delivering 10 MIPS at 40 MHz with 48 KB of enhanced Flash program memory, 3,328 bytes of RAM, and 52 digital I/O pins in a 64-pin TQFP (10x10 mm) package. It integrates a 12-channel 10-bit ADC, two USART modules, a Master I2C port, an SPI port, a CAN 2.0B module, and the standard PIC18 peripheral complement including multiple 16-bit timers and PWM/capture/compare blocks.
What is a PIC18 8-bit microcontroller? The PIC18 family is Microchip's flagship enhanced Harvard-architecture 8-bit MCU line built around an advanced RISC core that executes one instruction per clock cycle, achieving up to 10 MIPS throughput. Within the broader taxonomy, PIC18 microcontrollers belong to the microcontroller family, which sits beneath embedded controllers, which themselves fall under microprocessors and semiconductors. The 8-bit PIC18 platform is designed for deterministic, low-latency control tasks rather than high-throughput DSP or data-plane workloads, making it a workhorse for industrial, automotive, and consumer embedded applications where C-compiled firmware, mature toolchains, and long-term supply continuity matter more than raw MHz.
Key technical strengths of the PIC18F6585 include 48 KB of self-programmable enhanced Flash with endurance suitable for bootloader-driven field updates, an integrated CAN 2.0B controller with acceptance filtering for in-vehicle and industrial networking, and PIC18-standard nanoWatt power management with multiple idle and sleep modes that let battery-powered nodes drop quiescent current dramatically between events. The 12-channel, 10-bit successive-approximation ADC with auto-acquisition supports multi-sensor sampling for motor, lighting, and process-control designs, while the 52 I/O pins provide ample headroom for keypad, display, relay, and signal-conditioning expansion.
Architecturally the device uses a 16-bit instruction word with 8-bit data paths, dual-bus Harvard memory, a hardware multiplier for 8x8 in a single cycle, and an internal oscillator block with PLL options that lets designers trim external BOM by deriving system clock from the internal RC. The CAN module shares the PPS (Peripheral Pin Select) infrastructure and produces maskable interrupts through the PIC18 vectored interrupt controller, simplifying real-time response in deterministic control loops.
Typical applications include industrial HVAC and process control panels, automotive body and chassis subsystems running on CAN, medical instrumentation front-ends, building automation and security panels, USB/serial-connected data acquisition front-ends, and consumer appliance controllers. The 64-pin TQFP footprint is pin-compatible with other PIC18F6585 family members, enabling a single PCB to accept different Flash/RAM configurations without rework.
When designing with this MCU, pay attention to the ICP/ICD programming pin assignments and reserve adequate power decoupling; Microchip's MPLAB ICD 5 and PICkit 4/5 debuggers use dedicated pairs that should not be reassigned to general I/O if field firmware updates via ICSP are required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet.
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