NUMICRO-SDK Nuvoton Technology Corporation of America, NUMICRO-SDK Datasheet - Page 421

• Manufacturer Part Number: NUMICRO-SDK
• Description: KIT EVAUATION NUC100/120/130/140
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r
• Type: MCUr

Specifications of NUMICRO-SDK

• Contents: Board, Cable, CD, Nu-Link
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: NUC100, NUC120, NUC130, NUC140

5.13.4 Functional Description
5.13.4.1 Frame Formats
5.13.4.2 Frame Types
5.13.4.3 DATA FRAME
The bus has two complementary logical values, one is dominant bit represented by logic low level
another is recessive bit represented by logic high level.
There are two different formats which differ in the length of the IDENTIFIER field: Frames with the
number of 11 bits IDENTIFIER are denoted Standard Frames. In contrast, frames containing 29
bits IDENTIFIER are denoted Extended Frames.
Message transfer is manifested and controlled by four different frame types:
DATA FRAMES and REMOTE FRAMES can be used both in Standard Format and Extended
Format; they are separated from preceding frames by an INTERFRAME SPACE.
A DATA FRAME is composed of seven different bit fields: START of FRAME, ARBITRATION
FIELD, CONTROL FIELD, CRC FILED, ACK FIELD, and END OF FRAME. The DATA FIELD can
be of length zero.
1.
2.
3.
4.
A DATA FRAME carries data from a transmitter to the receivers
A REMOTE DATA FRAME is transmitted by a bus unit to request the transmission of the
DATA FRAME with the same IDENTIFIER
An ERROR FRAME is transmitted by any unit on detecting a bus error
An OVERLOAD FRAME is used to provide for an extra delay between the preceding and
the succeeding DATA or REMOTE FRAMES
NuMicro™ NUC100 Series Technical Reference Manual
- 421 -
Publication Release Date: Oct 22, 2010
Revision V1.06