Table of Contents
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Paragraph
Number
14.3.5
Control Register 0........................................................................................ 14-15
14.3.6
Control Register 1........................................................................................ 14-17
14.3.7
Control Register 2........................................................................................ 14-19
14.3.8
Status Registers (QASR0 and QASR1) ....................................................... 14-22
14.3.9
Conversion Command Word Table.............................................................. 14-28
14.3.10
Result Word Table........................................................................................ 14-34
14.4
Analog Subsystem ........................................................................................... 14-36
14.4.1
Analog-to-Digital Converter Operation....................................................... 14-36
14.4.1.1
Conversion Cycle Times.......................................................................... 14-36
14.4.2
Channel Decode and Multiplexer ................................................................ 14-37
14.4.3
Sample Buffer Amplifier ............................................................................. 14-37
14.4.4
Digital to Analog Converter (DAC) Array .................................................. 14-37
14.4.5
Comparator .................................................................................................. 14-38
14.4.6
Bias .............................................................................................................. 14-38
14.4.7
Successive Approximation Register ........................................................... 14-38
14.4.8
State Machine .............................................................................................. 14-38
14.5
Digital Subsystem ............................................................................................ 14-39
14.5.1
Queue Priority.............................................................................................. 14-39
14.5.2
Sub-Queues That are Paused ....................................................................... 14-39
14.5.3
Boundary Conditions ................................................................................... 14-41
14.5.4
Scan Modes.................................................................................................. 14-42
14.5.4.1
Disabled Mode......................................................................................... 14-43
14.5.4.2
Reserved Mode ........................................................................................ 14-43
14.5.4.3
Single-Scan Modes .................................................................................. 14-43
14.5.4.3.1
14.5.4.3.2
14.5.4.3.3
14.5.4.3.4
14.5.4.4
Continuous-Scan Modes.......................................................................... 14-47
14.5.4.4.1
14.5.4.4.2
14.5.4.4.3
14.5.4.4.4
14.5.5
QADC64E Clock (QCLK) Generation........................................................ 14-50
14.5.6
Periodic/Interval Timer................................................................................ 14-52
14.5.7
Configuration And Control Using the IMB3 Interface................................ 14-53
14.5.7.1
QADC64E Bus Interface Unit ................................................................. 14-53
14.5.7.2
QADC64E Bus Accessing ....................................................................... 14-53
14.6
Trigger and Queue Interaction Examples ........................................................ 14-55
14.6.1
Queue Priority Schemes............................................................................... 14-55
14.6.2
Conversion Timing Schemes ....................................................................... 14-65
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Contents
Software Initiated Single-Scan Mode.................................................. 14-44
External Trigger Single-Scan Mode .................................................... 14-45
External Gated Single-Scan Mode ...................................................... 14-45
Periodic/Interval Timer Single-Scan Mode ......................................... 14-46
Software Initiated Continuous-Scan Mode.......................................... 14-47
External Trigger Continuous-Scan Mode ............................................ 14-48
External Gated Continuous-Scan Mode .............................................. 14-49
Periodic/Interval Timer Continuous-Scan Mode................................. 14-49
Title
Contents
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Number
xvii
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