cp3bt26y98nepx National Semiconductor Corporation, cp3bt26y98nepx Datasheet - Page 116
cp3bt26y98nepx
Manufacturer Part Number
cp3bt26y98nepx
Description
Reprogrammable Connectivity Processor With Bluetooth-r, Usb, And Can Interfaces
Manufacturer
National Semiconductor Corporation
Datasheet
1.CP3BT26Y98NEPX.pdf
(280 pages)
- Current page: 116 of 280
- Download datasheet (5Mb)
www.national.com
Error Frame
As shown in Figure 43, the Error Frame consists of the error
flag and the error delimiter bit fields. The error flag field is
built up from the various error flags of the different nodes.
Therefore, its length may vary from a minimum of six bits up
to a maximum of twelve bits depending on when a module
has detected the error. Whenever a bit error, stuff error, form
error, or acknowledgment error is detected by a node, the
node starts transmission of an error flag at the next bit. If a
CRC error is detected, transmission of the error flag starts
Overload Frame
As shown in Figure 44, an overload frame consists of the
overload flag and the overload delimiter bit fields. The bit
fields have the same length as the error frame field: six bits
for the overload flag and eight bits for the delimiter. The
overload frame can only be sent after the end of frame
(EOF) field and in this way destroys the fixed form of the in-
termission field. As a result, all other nodes also detect an
Interframe Space
Data and remote frames are separated from every preced-
ing frame (data, remote, error and overload frames) by the
interframe space (see Figure 45). Error and overload
frames are not preceded by an interframe space; they can
be transmitted as soon as the condition occurs. The inter-
frame space consists of a minimum of three bit fields de-
pending on the error state of the node.
Note:
d = dominant
r = recessive
DATA FRAME OR
REMOVE FRAME
END OF FRAME OR
ERROR DELIMITER OR
OVERLOAD DELIMITER
Note:
d = dominant
r = recessive
d
d
ERROR
FLAG
d
6
d
An overload frame can only start at the end of a frame
An error frame can start anywhere within a frame
d
Figure 44. Overload Frame
d
OVERLOAD
d
Figure 43. Error Frame
d
FLAG
d
6
d
d
ERROR FLAG
d
ECHO
ERROR FRAME
OVERLOAD FRAME
< 6
d
d
116
d
r
at the bit following the acknowledge delimiter, unless an er-
ror flag for a previous error condition has already been start-
ed.
If a device is in the error active state, it can send a “domi-
nant” error flag, while a error passive device is only allowed
to transmit “recessive” error flags. This is done to prevent
the CAN bus from getting stuck due to a local defect. For the
various CAN device states, please refer to Error Types on
page 117.
overload condition and start the transmission of an overload
flag. After an overload flag has been transmitted, the over-
load frame is closed by the overload delimiter.
Note: The CAN module never initiates an overload frame
due to its inability to process an incoming message. Howev-
er, it is able to recognize and respond to overload frames ini-
tiated by other devices.
d
r
r
OVERLOAD
r
DELIMITER
r
r
r
8
DELIMITER
r
ERROR
r
r
8
r
r
r
r
r
INTER-FRAME SPACE
r
OR ERROR FRAME
d
OVERLOAD FRAME
INTER-FRAME OR
DS025
DS024
Related parts for cp3bt26y98nepx
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Freescale Semiconductor Technical Data
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum Tm Fractional N Rf / Integer N If Dual Low Power Frequency Synthesizer
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinum? 2.0 Ghz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Pllatinumtm 160 Mhz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Dual N-channel Enhancement Mode Field Effect Transistor
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Video Amplifier System (obsolete)
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Synchronous Step-up DC/DC Converter For White Led Applications
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
CLC420 - High Speed, Voltage Feedback op Amp, Package: Lcc, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Monolithic Triple 4.5 CRT Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Differential Video Amplifier
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
ADC10061 - 10-Bit 600 NS A/D Converter With Input Multiplexer And Sample/Hold, Package: Soic Wide, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
DS36277 - Dominant Mode Multipoint Transceiver, Package: Soic Narrow, Pin Nb=8
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
Part Number:
Description:
Quad High Speed Trapezoidal Bus Transceiver
Manufacturer:
National Semiconductor Corporation
Datasheet: