Thư Viện Tài Liệu Tổng Hợp

TaiLieuTongHop.Com - Kho tài liệu tổng hợp hoàn toàn miễn phí dành cho mọi người

Hãy sử dụng chức năng tìm kiếm bên dưới để tìm tài liệu trước khi post yêu cầu liên diễn đàn!


LinkBack Ðiều Chỉnh Xếp Bài
Prev Previous Post   Next Post Next
Old 03-04-2012, 12:44 PM
Senior Member
Tham gia: Feb 2012
Tổng số bài gởi: 4,709
Thanks: 1
Thanked 735 Times in 541 Posts


The acceptance and introduction of serial communication to more and more
applications has led to requirements that the assignment of message identifiers to
communication functions be standardized for certain applications. These applications
can be realized with CAN more comfortably, if the address range that originally has
been defined by 11 identifier bits is enlarged
Therefore a second message format (’extended format’) is introduced that provides a
larger address range defined by 29 bits. This will relieve the system designer from
compromises with respect to defining well-structured naming schemes. Users of CAN
who do not need the identifier range offered by the extended format, can rely on the
conventional 11 bit identifier range (’standard format’) further on. In this case they can
make use of the CAN implementations that are already available on the market, or of
new controllers that implement both formats.
In order to distinguish standard and extended format the first reserved bit of the CAN
message format, as it is defined in CAN Specification 1.2, is used. This is done in such
a way that the message format in CAN Specification 1.2 is equivalent to the standard
format and therefore is still valid. Furthermore, the extended format has been defined
so that messages in standard format and extended format can coexist within the same


Download và Xem Tài Liệu đầy đủ :

[Only registered and activated users can see links. ]

View more random threads same category:
Trả Lời Với Trích Dẫn


Ðiều Chỉnh
Xếp Bài

Quyền Sử Dụng
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is Mở
Smilies đang Mở
[IMG] đang Mở
HTML đang Tắt
Trackbacks are Tắt
Pingbacks are Tắt
Refbacks are Tắt