Infineon Technologies CY7C64713-56LFXC

Overview

CY7C64713-56LFXC from Cypress Semiconductor is a full-speed USB 2.0 peripheral controller integrating an enhanced 8051 microprocessor, USB transceiver, Serial Interface Engine (SIE), and General Programmable Interface (GPIF) in a single 56-pin QFN package. It supports 12/24/48 MHz 8051 operation, four programmable BULK/INTERRUPT/ISOCHRONOUS endpoints with double/triple/quad buffering, and operates at 3.3 V with 5 V tolerant inputs - enabling bus-powered USB device designs such as memory card readers and DSL modems.

For engineers reviewing the CY7C64713-56LFXC datasheet, CY7C64713-56LFXC pinout, CY7C64713-56LFXC application, or CY7C64713-56LFXC equivalent, key selection criteria include its ReNumeration™ capability, integrated I²C master (100/400 kHz), 16 KB on-chip RAM, 48 MHz 8051 core with two USARTs, and GPIF waveform programmability for glueless ASIC/DSP interfacing.

Technical Context

The CY7C64713 implements a hardware-accelerated Smart SIE that offloads USB protocol handling (including SETUP/DATA phase separation, vectored interrupts, and automatic CRC generation) from the 8051 core, reducing firmware complexity and ensuring USB compliance. Its dual USARTs operate at 230 KBaud with ≤1% error across all supported clock rates (12/24/48 MHz), and the I²C controller functions exclusively as a master with open-drain SCL/SDA pins requiring external 3.3 V pull-ups.

GPIF enables direct parallel interface to standards including ATA, EPP, and PCMCIA via programmable waveform descriptors and six CTL outputs/six RDY inputs. The 8/16-bit FIFO interface supports master/slave operation, asynchronous strobes, and automatic 8↔16-bit data width conversion - eliminating external glue logic while sustaining up to 96 MBps burst throughput.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.5 mm pitch), lead-free, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB peripheral controller applications.

Compared with CY7C64713-56LFXC, CY7C68013A offers expanded USB throughput and programmability but increases cost and power; CP2102N delivers lower-cost serial bridging but eliminates firmware-defined USB device behavior and parallel interface capability.

Availability

CY7C64713-56LFXC is available at Aetrix Electronics and suitable for DSL modems, memory card readers, legacy conversion devices, and wireless LAN adapters requiring stable component supply, long-term lifecycle support, and consistent USB peripheral functionality.

Supply support for CY7C64713-56LFXC 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, PSoC, and connectivity solutions for embedded systems.

The EZ-USB FX1 product line was designed specifically to accelerate time-to-market for USB peripheral devices by integrating transceiver, SIE, 8051 core, and GPIF into a single chip - targeting cost-sensitive, bus-powered applications with flexible firmware-defined USB identities.

FAQ

What boot methods does CY7C64713-56LFXC support?

The CY7C64713-56LFXC supports three boot methods: (1) USB download during enumeration (default), (2) I²C EEPROM loading (VID/PID/DID and firmware), and (3) external memory interface (128-pin variant only). Boot mode is determined automatically at power-up by checking I²C address 0x50 for valid EEPROM signature bytes (0xC0 or 0xC2).

Does CY7C64713-56LFXC support high-speed USB (480 Mbps)?

No. CY7C64713-56LFXC is a full-speed USB 2.0 device supporting only 12 Mbps signaling. It does not implement the high-speed PHY, chirp detection, or split-transaction handling required for 480 Mbps operation - as confirmed in the Functional Description section of datasheet 38-08039 Rev. *F.

How many general-purpose I/O pins are available on the 56-pin QFN package?

The CY7C64713-56LFXC provides up to 40 GPIOs in total, but the 56-pin QFN package allocates 24 dedicated GPIO pins (ports A, B, C, D with partial multiplexing), plus 6 CTL and 6 RDY lines usable as configurable I/O under GPIF control - yielding 36 functional I/O terminals in typical configurations.

Can CY7C64713-56LFXC operate from a 12 MHz crystal instead of 24 MHz?

No. The CY7C64713 requires a 24 MHz ±100 ppm fundamental-mode crystal for proper PLL operation. The internal PLL multiplies this to 480 MHz for the USB PHY and divides it to generate 12/24/48 MHz 8051 clocks. A 12 MHz crystal would fail to meet USB full-speed timing requirements and is not supported per the Crystal Configuration diagram on page 4 of datasheet 38-08039 Rev. *F.