
QADC
REFERENCE MANUAL
LIST OF ILLUSTRATIONS
MOTOROLA
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C-1
QADC Block Diagram ..................................................................................... 1-1
QADC Input and Output Signals .................................................................... 2-1
Bus Cycle Accesses ....................................................................................... 3-2
Example of External Multiplexing ................................................................... 4-2
Analog Input Circuitry ..................................................................................... 5-2
Errors Resulting from Clipping ....................................................................... 5-3
Star-Ground at the Point of Power Supply Origin ........................................... 5-4
Input Pin Subjected to Negative Stress .......................................................... 5-5
Voltage Limiting Diodes in a Negative Stress Circuit ..................................... 5-6
External Multiplexing Of Analog Signal Sources ............................................ 5-7
Electrical Model of an A/D Input Pin ............................................................... 5-8
QADC Module Block Diagram ........................................................................ 6-1
Conversion Timing ......................................................................................... 6-2
Bypass Mode Conversion Timing ................................................................... 6-3
QADC Queue Operation With Pause ............................................................. 7-2
QADC Clock Subsystem Functions .............................................................. 7-10
QADC Clock Programmability Examples ..................................................... 7-12
Queue Status Transition ............................................................................... 7-25
QADC Conversion Queue Operation ........................................................... 7-27
QADC Interrupt Flow Diagram ....................................................................... 8-1
QADC Interrupt Vector Format ....................................................................... 8-5
CCW Priority Situation 1 ................................................................................. 9-2
CCW Priority Situation 2 ................................................................................. 9-3
CCW Priority Situation 3 ................................................................................. 9-3
CCW Priority Situation 4 ................................................................................. 9-4
CCW Priority Situation 5 ................................................................................. 9-4
CCW Priority Situation 6 ................................................................................. 9-5
CCW Priority Situation 7 ................................................................................. 9-5
CCW Priority Situation 8 ................................................................................. 9-6
CCW Priority Situation 9 ................................................................................. 9-6
CCW Priority Situation 10 ............................................................................... 9-7
CCW Priority Situation 11 ............................................................................... 9-7
CCW Freeze Situation 12 ............................................................................... 9-8
CCW Freeze Situation 13 ............................................................................... 9-8
CCW Freeze Situation 14 ............................................................................... 9-8
CCW Freeze Situation 15 ............................................................................... 9-9
CCW Freeze Situation 16 ............................................................................... 9-9
CCW Freeze Situation 17 ............................................................................... 9-9
CCW Freeze Situation 18 ............................................................................... 9-9
CCW Freeze Situation 19 ............................................................................. 9-10
Transfer Curve of an Ideal 10-Bit A/D Converter ...........................................C-1
LIST OF ILLUSTRATIONS
F
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