MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 175
MC68HC705V12CFN
Manufacturer Part Number
MC68HC705V12CFN
Description
The Motorola microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705V12CFN.pdf
(248 pages)
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MC68HC705V12
MOTOROLA
NB = Normalization bit
ID = Identifier, usually the physical address of the responder(s)
HEADER
HEADER
HEADER
HEADER
—
TYPE 0 — NO IFR
TYPE 1 — SINGLE BYTE TRANSMITTED FROM A SINGLE RESPONDER
TYPE 2 — SINGLE BYTE TRANSMITTED FROM MULTIPLE RESPONDERS
TYPE 3 — MULTIPLE BYTES TRANSMITTED FROM A SINGLE RESPONDER
Rev. 3.0
Figure 14-19. Types of In-Frame Response (IFR)
DATA FIELD
DATA FIELD
DATA FIELD
DATA FIELD
TSIFR — Transmit Single Byte IFR with No CRC (Type 1 or 2) Bit
If the programmer attempts to set the TSIFR bit immediately after the
EOD symbol has been received from the bus, the TSIFR bit will remain
in the reset state and no attempt will be made to transmit the IFR byte.
If a loss of arbitration occurs when the BDLC attempts to transmit and
after the IFR byte winning arbitration completes transmission, the BDLC
The TSIFR bit is used to request the BDLC to transmit the byte in the
BDLC data register (BDR) as a single byte IFR with no CRC.
Typically, the byte transmitted is a unique identifier or address of the
transmitting (responding) node. See
Byte Data Link Controller – Digital (BDLC–D)
1 = If this bit is set prior to a valid EOD being received with no CRC
0 = The TSIFR bit will be cleared automatically, once the BDLC
error, once the EOD symbol has been received the BDLC will
attempt to transmit the appropriate normalization bit followed
by the byte in the BDR.
has successfully transmitted the byte in the BDR onto the
bus, or TEOD is set, or an error is detected on the bus.
CRC
CRC
CRC
CRC
NB
NB
NB
ID
ID1
IFR DATA FIELD
Byte Data Link Controller – Digital (BDLC–D)
Figure
14-19.
ID N
(OPTIONAL)
BDLC CPU Interface
Advance Information
CRC
175
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