AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 18

• Manufacturer Part Number: AN2131QC
• Description: IC MCU 8051 8K RAM 24MHZ 80BQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131QC

• Applications: USB Microcontroller
• Core Processor: 8051
• Program Memory Type: ROMless
• Controller Series: AN213x
• Ram Size: 8K x 8
• Interface: I²C, USB
• Number Of I /o: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1307

Like a well designed automobile or appliance, a USB peripheral’s outward simplicity
hides internal complexity. There’s a lot going on “under the hood” of a USB device,
which gives the user a new level of convenience. For example:
USB is defined in the Universal Serial Bus Specification Version 1.1 (http://usb.org), a
268-page document that describes all aspects of a USB device in elaborate detail. This
EZ-USB Technical Reference Manual describes the EZ-USB chip along with USB topics
that should provide help in understanding the Specification.
The Cypress Semiconductor EZ-USB is a compact integrated circuit that provides a
highly integrated solution for a USB peripheral device. Three key EZ-USB features are:
EZ-USB TRM v1.9
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A USB device can be plugged in anytime, even when the PC is turned on.
When the PC detects that a USB device has been plugged in, it automatically inter-
rogates the device to learn its capabilities and requirements. From this informa-
tion, the PC automatically loads the device’s driver into the operating system.
When the device is unplugged, the operating system automatically logs it off and
unloads its driver.
USB devices do not use DIP switches, jumpers, or configuration programs. There
is never an IRQ, DMA, MEMORY, or IO conflict with a USB device.
USB expansion hubs make the bus available to dozens of devices.
USB is fast enough for printers, CD-quality audio, and scanners.
The EZ-USB family provides a soft (RAM-based) solution that allows unlimited
configuration and upgrades.
The EZ-USB family delivers full USB throughput. Designs that use EZ-USB are
not limited by number of endpoints, buffer sizes, or transfer speeds.
The EZ-USB family does much of the USB housekeeping in the EZ-USB core,
simplifying code and accelerating the USB learning curve.
Introduction
1 Introducing EZ-USB
Chapter 1. Introducing EZ-USB
Page 1-1