MOTOROLA
Page vi
MC68HC05C0 Specification Rev. 1.2
SECTION 12
SERIAL COMMUNICATIONS INTERFACE.................. 61
12.1
OVERVIEW AND FEATURES ................................................. 61
12.1.1
SCI TWO-WIRE SYSTEM FEATURES.............................. 61
12.1.2
SCI RECEIVER FEATURES .............................................. 61
12.1.3
SCI TRANSMITTER FEATURES ....................................... 61
12.2
DATA FORMAT ....................................................................... 62
12.3
FUNCTIONAL DESCRIPTION................................................. 62
12.4
RECEIVER............................................................................... 65
12.4.1
SCI RECEIVER WAKE-UP FEATURE............................... 65
12.4.1.1
SCI RECEIVER IDLE WAKE-UP .................................. 65
12.4.1.2
SCI RECEIVER ADDRESS MARK WAKE-UP ............. 65
12.4.2
RECEIVE DATA IN............................................................. 65
12.4.3
START BIT DETECTION FOLLOWING A FRAMING
ERROR............................................................................... 67
12.5
TRANSMITTER........................................................................ 68
12.5.1
TRANSMIT DATA OUT ...................................................... 68
12.5.2
SCI SYNCHRONOUS TRANSMISSION ............................ 68
12.6
REGISTERS ............................................................................ 69
12.6.1
SERIAL COMMUNICATIONS DATA REGISTER
(SCDAT) ............................................................................. 69
12.6.2
SERIAL COMMUNICATIONS CONTROL REGISTER 1
(SCCR1) ............................................................................. 69
12.6.3
SERIAL COMMUNICATIONS CONTROL REGISTER 2
(SCCR2) ............................................................................. 74
12.6.4
SERIAL COMMUNICATIONS STATUS REGISTER
(SCSR) ............................................................................... 76
12.6.5
BAUD RATE REGISTER.................................................... 78
12.7
SCI DURING WAIT MODE ...................................................... 82
12.8
SCI DURING STOP MODE ..................................................... 82
SECTION 13
ELECTRICALS .............................................................. 83
13.1
MAXIMUM RATINGS............................................................... 83
13.2
THERMAL CHARACTERISTICS ............................................. 83
13.3
DC ELECTRICAL CHARACTERISTICS.................................. 84
13.4
CONTROL TIMING .................................................................. 85