Key facts
- Brand
- Cypress
- Model
- CY31A
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-06-04
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CYPRESS CY7C63221A/31A enCoRe USB Low-speed USB Peripheral Controller Manual
The CY7C63221/31A enCoRe™ USB controller is a low‑speed USB peripheral device that integrates an internal 3.3 V regulator, crystal‑less oscillator, and optional PS/2 mode. It provides up to 10 configurable GPIO pins, a 96‑byte RAM, 3 KB of EPROM, and built‑in watchdog, low‑voltage reset, and brown‑out protection.
The manual covers functional overview, pin assignments, programming model, instruction set, memory organization, clocking, reset behavior, USB serial interface engine, and ordering information. It also includes absolute maximum ratings, DC characteristics, and package diagrams for the various PDIP and SOIC options.
Cypress CY31A specifications
| Operating voltage | 4.0 V to 5.5 VDC |
|---|---|
| Operating temperature | 0 °C to 70 °C |
| EPROM size | 3 KB |
| RAM size | 96 bytes |
| GPIO pins | Up to 10 versatile GPIO pins |
| GPIO current drive | 50 mA per pin (sink) |
| Internal regulator | 3.3 V regulator for USB pull‑up |
| USB specification compliance | USB 2.0 low‑speed, HID 1.1 |
Source: Cypress CY7C63221/31A USB Peripheral Controller Manual
All Cypress CY31A documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Instruction set, parameters and examples for configuring or programming the device.
Questions answered in these manuals
What voltage range does the CY7C63221/31A operate at?
It operates from 4.0 V to 5.5 VDC.
From: Cypress CY7C63221/31A USB Peripheral Controller Manual
Does the controller include an internal oscillator?
Yes, it has an internal oscillator that removes the need for an external crystal or resonator.
From: Cypress CY7C63221/31A USB Peripheral Controller Manual
What is the operating voltage range of the CY7C63221/31A?
It operates from 4.0 V to 5.5 VDC.
From: CYPRESS CY7C63221A/31A enCoRe USB Low-speed USB Peripheral Controller Manual
How many GPIO pins are available and how much current can each sink?
The device provides up to 10 GPIO pins, each capable of sinking up to 50 mA.
From: CYPRESS CY7C63221A/31A enCoRe USB Low-speed USB Peripheral Controller Manual