XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 14
XC912BC32CFU8
Manufacturer Part Number
XC912BC32CFU8
Description
M68HC12B Family Data Sheet
Manufacturer
Motorola Semiconductor Products
Datasheet
1.XC912BC32CFU8.pdf
(362 pages)
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Table of Contents
Data Sheet
14
15.6
15.6.0.1
15.6.0.2
15.7
15.7.1
15.7.1.1
15.7.1.2
15.7.2
15.7.2.1
15.7.2.2
15.7.2.3
15.7.2.4
15.7.2.5
15.7.2.6
15.7.2.7
15.7.2.8
15.7.2.9
15.7.3
15.7.3.1
15.7.3.2
15.7.3.3
15.7.3.4
15.7.3.5
15.7.3.6
15.7.3.7
15.7.3.8
15.7.3.9
15.7.4
15.7.4.1
15.7.4.2
15.7.4.3
15.7.4.4
15.7.4.5
15.7.4.6
15.7.4.7
15.7.4.8
15.7.4.9
15.7.4.10
15.7.4.11
15.7.5
15.8
15.8.1
15.8.2
15.8.3
15.8.4
Loopback Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
BDLC MUX Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
BDLC Protocol Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Rx Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
J1850 Frame Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
J1850 VPW Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
J1850 VPW Valid/Invalid Bits and Symbols . . . . . . . . . . . . . . . . . . 240
Message Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Protocol Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Rx and Tx Shift Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Rx and Tx Shadow Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Digital Loopback Multiplexer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Digital Loopback Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Analog Loopback Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
SOF — Start-of-Frame Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Data — In-Message Data Bytes . . . . . . . . . . . . . . . . . . . . . . . . . 235
CRC — Cyclical Redundancy Check Byte . . . . . . . . . . . . . . . . . 235
EOD — End-of-Data Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
IFR — In-Frame Response Bytes . . . . . . . . . . . . . . . . . . . . . . . . 236
EOF — End-of-Frame Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . 236
IFS — Interframe Separation Symbol . . . . . . . . . . . . . . . . . . . . . 236
BREAK — Break . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
IDLE — Idle Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Logic 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Logic 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Normalization Bit (NB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Break Signal (BREAK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Start-of-Frame Symbol (SOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
End-of-Data Symbol (EOD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
End-of-Frame Symbol (EOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Inter-Frame Separation Symbol (IFS) . . . . . . . . . . . . . . . . . . . . . 239
Idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Invalid Passive Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Valid Passive Logic 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Valid Passive Logic 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Valid EOD Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Valid EOF and IFS Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Idle Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Invalid Active Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Valid Active Logic 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Valid Active Logic 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Valid SOF Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Valid BREAK Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Table of Contents
M68HC12B Family — Rev. 8.0
MOTOROLA
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