AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 20

• Manufacturer Part Number: AN2136SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2136SC

• 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: 8
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1309

Figure 1-2 illustrates the An2131Q, an 80-pin version of the EZ-USB family. In addition
to the 24 IO pins, it contains a 16-bit address bus and an 8-bit data bus for external mem-
ory expansion.
A special fast transfer mode moves data directly between external logic and internal USB
FIFOs. The fast transfer mode, along with abundant endpoint resources, allows the EZ-
USB family to support transfer bandwidths beyond the maximum required by the Univer-
sal Serial Bus Specification Version 1.1.
The Universal Serial Bus Specification Version 1.1 is available on the Internet at http://
usb.org. Published in January 1998, the specification is the work of a founding commit-
tee of seven industry heavyweights: Compaq, DEC, IBM, Intel, Microsoft, NEC, and
Northern Telecom. This impressive list of implementers secures USB as the low to
medium speed PC connection method of the future.
A glance at the USB Specification makes it immediately apparent that USB is not nearly
as simple as the customary serial or parallel port. The specification uses new terms like
“endpoint,” isochronous,” and “enumeration,” and finds new uses for old terms like “con-
figuration,” “interface,” and “interrupt.” Woven into the USB fabric is a software abstrac-
tion model that deals with things such as “pipes.” The specification also contains detail
about the connector types and wire colors.
EZ-USB TRM v1.9
1.3
Connector
GND
USB
+5V
D+
D-
The USB Specification
Transceiver
USB
Figure 1-2. AN2131Q (80 pin) Simplified Block Diagram
Interface
Engine
Serial
Chapter 1. Introducing EZ-USB
(SIE)
EZ-USB
bytes
bytes
Interface
USB
Microprocessor
Purpose
General
Program &
RAM
Data
Address Bus
Data Bus
IO Ports
Memory,
External
FIFOS,
Page 1-3
etc.