MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 329
MC68HC708AS48
Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC708AS48.pdf
(396 pages)
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20.1 Contents
MC68HC708AS48
MOTOROLA
Advance Information — MC68HC708AS48
Section 20. Byte Data Link Controller–Digital (BDLC–D)
—
Rev. 4.0
20.2
20.3
20.4
20.4.1
20.4.1.1
20.4.1.2
20.4.1.3
20.4.1.4
20.4.1.5
20.4.1.6
20.4.1.7
20.5
20.5.1
20.5.1.1
20.5.1.2
20.5.2
20.5.3
20.5.4
20.5.5
20.6
20.6.1
20.6.2
20.6.3
20.6.4
20.6.5
20.6.5.1
20.6.5.2
20.6.5.3
Byte Data Link Controller–Digital (BDLC–D)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .331
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .331
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .332
BDLC MUX Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .337
BDLC Protocol Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352
BDLC Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . .334
Rx Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338
J1850 Frame Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . .340
J1850 VPW Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . .343
J1850 VPW Valid/Invalid Bits and Symbols . . . . . . . . . . .346
Message Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .350
Protocol Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353
Rx and Tx Shift Registers . . . . . . . . . . . . . . . . . . . . . . . . .353
Rx and Tx Shadow Registers . . . . . . . . . . . . . . . . . . . . . .354
Digital Loopback Multiplexer . . . . . . . . . . . . . . . . . . . . . . .354
State Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .354
Power Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .334
Reset Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .335
Run Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .335
BDLC Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .335
BDLC Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .336
Digital Loopback Mode. . . . . . . . . . . . . . . . . . . . . . . . . .336
Analog Loopback Mode . . . . . . . . . . . . . . . . . . . . . . . . .336
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338
Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339
4X Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .354
Receiving a Message in Block Mode . . . . . . . . . . . . . . .355
Transmitting a Message in Block Mode . . . . . . . . . . . . .355
Advance Information
329
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