Infineon Technologies CY7C63001A-PC

Overview

CY7C63001A-PC from Cypress Semiconductor is an 8-bit RISC USB microcontroller optimized for low-speed (1.5 Mbps) human-interface devices, featuring a built-in USB Serial Interface Engine (SIE), 4 Kbytes of OTP EPROM, 128 bytes of RAM, and 12 GPIOs (8× Port 0 + 4× Port 1). It operates at 12 MHz internal clock derived from a 6-MHz ceramic resonator and supports one device address with two endpoints (control + data) - used in wired optical mice requiring integrated LED drive and photo-transistor timing control.

For engineers reviewing the CY7C63001A-PC datasheet, CY7C63001A-PC pinout, CY7C63001A-PC application, or CY7C63001A-PC equivalent, key selection criteria include low-speed USB compliance, OTP memory security fuse, Schmitt-trigger I/O with programmable sink current, suspend/wake-up via CEXT pin, and PDIP-20 package compatibility with legacy PCB layouts.

Technical Context

The CY7C63001A implements a Harvard-architecture RISC core with 35 USB-optimized instructions and integrates a full low-speed USB transceiver with D+/D– differential I/O, internal pull-up support, and SE0 detection logic for bus reset recognition. Its memory map allocates 16 bytes for interrupt vectors (including GPIO, CEXT, and USB endpoint interrupts) and reserves upper RAM addresses (0x70–0x7F) as dual 8-byte FIFOs for endpoint buffering.

Reset behavior is multi-source: Power-On Reset initializes POR bit (SCR bit 4), Watchdog Reset clears USB DA register and disables transmitter until WDR bit (bit 6) is cleared by firmware, and USB Bus Reset (bit 5) restarts oscillator if device is suspended. Suspend mode halts oscillator and timers while retaining USB receiver and GPIO/Cext interrupt wake capability.

Key Specifications

Pinout & Package

Package: 20-pin Plastic Dual In-line Package (PDIP), 0.300-inch body width, standard through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB HID microcontroller applications.

Compared with CY7C63101A-QC and FT900-48K-ND, the CY7C63001A-PC delivers optimal cost-performance balance for fixed-function, low-speed HID peripherals where OTP security, minimal BOM, and PDIP serviceability are prioritized over scalability or speed.

Availability

CY7C63001A-PC is available at Aetrix Electronics and suitable for optical mouse designs, USB joystick production, and gamepad controller manufacturing requiring stable component supply and long-term obsolescence management.

Supply support for CY7C63001A-PC 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in USB, memory, and programmable system-on-chip solutions for embedded interfaces and industrial control.

The CY7C63001A belongs to Cypress's legacy USB microcontroller product line, designed specifically to replace PS/2 interfaces in cost-sensitive HID peripherals while maintaining full USB 1.1 compliance and minimal external component count.

FAQ

What is the maximum operating frequency of the CY7C63001A-PC core?

The CY7C63001A-PC runs its 8-bit RISC core at 12 MHz internally, generated by doubling a 6-MHz external ceramic resonator signal. This frequency is fixed and not user-adjustable; the architecture does not support PLL-based clock multiplication beyond the internal doubler. No external clock source can override this 12-MHz operation.

Does the CY7C63001A-PC support USB suspend/resume without external components?

Yes - the CY7C63001A-PC implements hardware suspend mode via the Suspend bit (bit 3) in SCR register 0xFF. Resume is triggered automatically by USB activity, GPIO edge interrupts, or CEXT pin transitions. Only the CEXT pin requires an external RC network for periodic wake-up; no other external components are needed for basic suspend/resume functionality.

Can the EPROM memory be reprogrammed after initial programming?

No - the CY7C63001A-PC uses One-Time Programmable (OTP) EPROM. Once programmed, the 4 Kbytes of program memory cannot be erased or rewritten. The security fuse bit, when set, permanently blocks readback of code contents. Programming requires a dedicated EPROM programmer applying 12.5 V to VPP pin; normal operation ties VPP to ground.

How many USB endpoints does the CY7C63001A-PC support, and what are their roles?

The CY7C63001A-PC supports exactly two USB endpoints: Endpoint 0 (control) and Endpoint 1 (data). Endpoint 0 handles all USB standard requests (SETUP, GET_DESCRIPTOR, SET_ADDRESS) and is mandatory. Endpoint 1 is configurable as interrupt IN for HID reports (e.g., mouse movement packets) and uses an 8-byte FIFO in RAM. No bulk or isochronous endpoints are implemented.