MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 137
MC68HC705V12CFN
Manufacturer Part Number
MC68HC705V12CFN
Description
The Motorola microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705V12CFN.pdf
(248 pages)
- Current page: 137 of 248
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14.1 Contents
MC68HC705V12
MOTOROLA
Advance Information — MC68HC705V12
Section 14. Byte Data Link Controller – Digital (BDLC–D)
—
Rev. 3.0
14.2
14.3
14.4
14.4.1
14.4.1.1
14.4.1.2
14.4.1.3
14.4.1.4
14.4.1.5
14.4.1.6
14.4.1.7
14.5
14.5.1
14.5.1.1
14.5.1.2
14.5.2
14.5.3
14.5.4
14.5.5
14.6
14.6.1
14.6.2
14.6.3
14.6.4
14.6.5
14.6.5.1
14.6.5.2
14.6.5.3
14.6.5.4
14.6.5.5
Byte Data Link Controller – Digital (BDLC–D)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
BDLC MUX Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
BDLC Protocol Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
BDLC Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . .142
Rx Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
J1850 Frame Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
J1850 VPW Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
J1850 VPW Valid/Invalid Bits and Symbols . . . . . . . . . . .154
Message Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158
Protocol Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Rx and Tx Shift Registers . . . . . . . . . . . . . . . . . . . . . . . . .162
Rx and Tx Shadow Registers . . . . . . . . . . . . . . . . . . . . . .162
Digital Loopback Multiplexer . . . . . . . . . . . . . . . . . . . . . . .162
State Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162
Power Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
Run Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
BDLC Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144
BDLC Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144
Digital Loopback Mode. . . . . . . . . . . . . . . . . . . . . . . . . .144
Analog Loopback Mode . . . . . . . . . . . . . . . . . . . . . . . . .145
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
4X Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163
Receiving a Message in Block Mode . . . . . . . . . . . . . . .163
Transmitting a Message in Block Mode . . . . . . . . . . . . .163
J1850 Bus Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165
Advance Information
137
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