MOTOROLA
Page vii
MC68HC05V7 Specification Rev. 1.0
15.2.4
MDLC TX CONTROL REGISTER (MTCR) $10................100
15.2.5
MDLC RX STATUS REGISTER (MRSR) $11...................101
15.3
MDLC Rx/Tx BUFFERS .........................................................103
15.3.1
OUTLINE...........................................................................103
15.3.2
RX BUFFERS....................................................................105
15.3.3
TX BUFFER ......................................................................106
15.4
MDLC PROTOCOL HANDLER ..............................................108
15.4.1
OUTLINE...........................................................................108
15.4.2
Rx & Tx SHIFT REGISTERS ............................................108
15.4.3
STATE MACHINE .............................................................109
15.5
MDLC MUX INTERFACE .......................................................112
15.5.1
Rx DIGITAL FILTER..........................................................112
15.5.2
J1850 FRAME FORMAT...................................................114
15.5.3
J1850 VPW SYMBOLS .....................................................116
15.5.4
J1850 VPW VALID/INVALID BITS & SYMBOLS ..............117
15.5.5
MESSAGE ARBITRATION ...............................................121
15.6
MDLC PHYSICAL INTERFACE .............................................123
15.6.1
OUTLINE...........................................................................123
15.6.2
MUX INTERFACE SIGNALS ............................................126
15.6.3
PINS ..................................................................................127
15.7
MDLC APPLICATION NOTES ...............................................128
15.7.1
INITIALIZATION ................................................................128
15.7.2
TRANSMITTING A MESSAGE .........................................128
15.7.3
RECEIVING A MESSAGE ................................................128
15.7.4
RECEIVING A MESSAGE IN BLOCK MODE...................129
15.7.5
MDLC STOP MODE..........................................................130
15.7.6
MDLC WAIT MODE ..........................................................130
15.7.7
CONTROLLING EXTERNAL VOLTAGE
REGULATORS................................................................130
SECTION 16
INSTRUCTION SET .................................................... 133
16.1
REGISTER/MEMORY INSTRUCTIONS ................................133
16.2
READ-MODIFY-WRITE INSTRUCTIONS..............................133
16.3
BRANCH INSTRUCTIONS.....................................................134
16.4
BIT MANIPULATION INSTRUCTIONS...................................134
16.5
CONTROL INSTRUCTIONS ..................................................135
16.6
ADDRESSING MODES..........................................................135
16.6.1
IMMEDIATE ......................................................................136
16.6.2
DIRECT .............................................................................136
16.6.3
EXTENDED.......................................................................136
16.6.4
RELATIVE .........................................................................136
16.6.5
INDEXED, NO OFFSET....................................................136
16.6.6
INDEXED, 8-BIT OFFSET ................................................136
16.6.7
INDEXED, 16-BIT OFFSET ..............................................137
16.6.8
BIT SET/CLEAR................................................................137
16.6.9
BIT TEST AND BRANCH..................................................137
16.6.10
INHERENT ........................................................................137