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首页STC单片机USB下载器原理图
STC单片机USB下载器原理图

最近因为想用STC的单片机,但电脑的串口不能用所以只能用USB下载,找了好久最终找到很好的原理图,大家分享~
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PL-2303 Edition
USB to Serial Bridge Controller
Product Datasheet
Document Revision: 1.6B
Document Release: June 22, 2005
Prolific Technology Inc.
7F, No. 48, Sec. 3, Nan Kang Rd.
Nan Kang, Taipei 115, Taiwan, R.O.C.
Telephone: +886-2-2654-6363
Fax: +886-2-2654-6161
E-mail:
sales@prolific.com.tw
Website: http://www.prolific.com.tw

Revised Date:
June 22, 2005
ds_pl2303_v16B.doc
Disclaimer
All the information in this document is subject to change without prior notice. Prolific Technology Inc.
does not make any representations or any warranties (implied or otherwise) regarding the accuracy
and completeness of this document and shall in no event be liable for any loss of profit or any other
commercial damage, including but not limited to special, incidental, consequential, or other damages.
Trademarks
The Prolific logo is a registered trademark of Prolific Technology Inc. All brand names and product
names used in this document are trademarks or registered trademarks of their respective holders.
Copyrights
Copyright © 2005 Prolific Technology Inc. All rights reserved.
No part of this document may be reproduced or transmitted in any form by any means without the
express written permission of Prolific Technology Inc.
PL-2303H Product Datasheet - 2 - Document Version 1.6B

Revised Date:
June 22, 2005
ds_pl2303_v16B.doc
Revision History
Revision Description Date
1.6B Modify Ordering Information (Sec 11.0) June 22, 2005
1.6 Modify Temperature Characteristics (Sec 8.4) April 26, 2005
1.5
Added List of Figures and List of Tables
Modify Features section
Improve clarity of Pin Assignment diagram
Correct Minimum Operating Temperature to 0
o
C
Modify Operating Voltage
Add EEPROM Timing Diagram
Add Reset Timing Diagram
Added Ordering Information
Added Reel Packing Information
February 02, 2005
1.4 Add Windows CE .NET support feature August 29, 2002
1.3
Buffer for upstream and downstream data flow – change
from 96 to 256 bytes
August 01, 2002
1.2
For Chip Version H (date code 0206)
Add OS Support in Features Section
Correct default values in Table 5. Device Configuration
Register
Add Suspend Current in DC Characteristics Section
Move Operating Temperature in DC Characteristics to new
section
July 03, 2002
PL-2303H Product Datasheet - 3 - Document Version 1.6B

Revised Date:
June 22, 2005
ds_pl2303_v16B.doc
Table of Contents
1.0 FEATURES........................................................................................................6
2.0 INTRODUCTION ...............................................................................................6
3.0 FUNCTIONAL BLOCK DIAGRAM....................................................................7
4.0 PIN ASSIGNMENT OUTLINE ...........................................................................8
5.0 PIN ASSIGNMENT & DESCRIPTION...............................................................9
6.0 DATA FORMATS & PROGRAMMABLE BAUD RATE GENERATOR............10
7.0 EXTERNAL EEPROM AND DEVICE CONFIGURATION...............................11
8.0 ELECTRICAL, TEMPERATURE & TIMING CHARACTERISTICS.................13
8.1 Absolute Maximum Ratings ................................................................................. 13
8.2 DC Characteristics...............................................................................................13
8.3 Clock Characteristics ...........................................................................................13
8.4 Temperature Characteristics................................................................................14
8.5 USB Transceiver Characteristics .........................................................................14
8.6 EEPROM Timing Diagram ...................................................................................14
8.7 Reset Timing Diagram ......................................................................................... 15
9.0 OUTLINE DIAGRAM.......................................................................................16
9.1 SSOP28 Package................................................................................................ 16
10.0 REEL PACKING INFORMATION....................................................................17
10.1 Carrier Tape (SSOP-28)....................................................................................... 17
10.2 Reel Dimension ...................................................................................................18
11.0 ORDERING INFORMATION ...........................................................................18
PL-2303H Product Datasheet - 4 - Document Version 1.6B
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