AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 26
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AN2136SC
Manufacturer Part Number
AN2136SC
Description
IC MCU 8051 8K RAM 24MHZ 44QFP
Manufacturer
Cypress Semiconductor Corp
Series
EZ-USB®r
Datasheet
1.AN2131SC.pdf
(334 pages)
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
Available stocks
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Price
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FREESCALE
Quantity:
2 000
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Manufacturer:
cypress
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Part Number:
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CYPRESS/赛普拉斯
Quantity:
20 000
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Control transfers consist of two or three stages. The SETUP stage contains eight bytes of
USB CONTROL data. An optional DATA stage contains more data, if required. The
STATUS (or handshake) stage allows the device to indicate successful completion of a
control operation.
Your computer is ON. You plug in a USB device, and the Windows
an hourglass, and then back to a cursor. And magically, your device is connected and its
Windows
configure countless jumpers, drivers, and IO/Interrupt/DMA settings knows that a USB
connection can be like a miracle. We’ve all heard about Plug and Play, but USB delivers
the real thing.
How does all this happen automatically? Inside every USB device is a table of ‘descrip-
tors’ that are the sum total of the device’s requirements and capabilities. When you plug
into USB, the host goes through a ‘sign-on’ sequence:
This sign-on process is called Enumeration.
EZ-USB TRM v1.9
1.9
1. The host sends a “Get_Descriptor/Device” request to address zero (devices must
2. The device dutifully responds to this request by sending ID data back to the host
3. The host sends the device a “Set_Address” request, which gives it a unique address
4. The host sends more “Get_Descriptor” requests, asking more device information.
respond to address zero when first attached).
telling what it is.
to distinguish it from the other devices connected to the bus.
from this, it learns everything else about the device, like how many endpoints the
device has, its power requirements, what bus bandwidth it requires, and what
driver to load.
Enumeration
driver is loaded! Anyone who has installed a sound card into a PC and had to
Chapter 1. Introducing EZ-USB
cursor switches to
Page 1-9
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