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8XC196MC, MD, MH USER’S MANUAL
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10.5.2 Reading the Current Value of the Down-counter ....................................................10-7
10.5.3 Enabling the PWM Outputs .....................................................................................10-8
10.5.4 Generating Analog Outputs ..................................................................................10-10
CHAPTER 11
EVENT PROCESSOR ARRAY (EPA)
11.1 EPA FUNCTIONAL OVERVIEW ................................................................................. 11-1
11.2 EPA AND TIMER/COUNTER SIGNALS AND REGISTERS....................................... 11-2
11.3 TIMER/COUNTER FUNCTIONAL OVERVIEW........................................................... 11-5
11.3.1 Cascade Mode (Timer 2 Only) ................................................................................11-7
11.3.2 Quadrature Clocking Modes ...................................................................................11-7
11.4 EPA CHANNEL FUNCTIONAL OVERVIEW............................................................... 11-9
11.4.1 Operating in Capture Mode ...................................................................................11-10
11.4.1.1 EPA Overruns ..................................................................................................11-12
11.4.1.2 Preventing EPA Overruns ................................................................................11-13
11.4.2 Operating in Compare Mode .................................................................................11-13
11.4.2.1 Generating a Low-speed PWM Output ............................................................11-13
11.4.2.2 Generating the Highest-speed PWM Output ....................................................11-14
11.5 PROGRAMMING THE EPA AND TIMER/COUNTERS............................................. 11-15
11.5.1 Configuring the EPA and Timer/Counter Signals ..................................................11-15
11.5.2 Programming the Timers .......................................................................................11-15
11.5.3 Programming the Capture/Compare Channels .....................................................11-18
11.5.4 Programming the Compare-only Channels ...........................................................11-22
11.6 ENABLING THE EPA INTERRUPTS ........................................................................ 11-23
11.7 DETERMINING EVENT STATUS.............................................................................. 11-24
CHAPTER 12
ANALOG-TO-DIGITAL (A/D) CONVERTER
12.1 A/D CONVERTER FUNCTIONAL OVERVIEW........................................................... 12-1
12.2 A/D CONVERTER SIGNALS AND REGISTERS ........................................................ 12-2
12.3 A/D CONVERTER OPERATION ................................................................................. 12-3
12.4 PROGRAMMING THE A/D CONVERTER .................................................................. 12-4
12.4.1 Programming the A/D Test Register .......................................................................12-5
12.4.2 Programming the A/D Result Register (for Threshold Detection Only) ...................12-5
12.4.3 Programming the A/D Time Register ......................................................................12-6
12.4.4 Programming the A/D Command Register ..............................................................12-7
12.4.5 Enabling the A/D Interrupt .......................................................................................12-8
12.5 DETERMINING A/D STATUS AND CONVERSION RESULTS.................................. 12-9
12.6 DESIGN CONSIDERATIONS.................................................................................... 12-10
12.6.1 Designing External Interface Circuitry ...................................................................12-10
12.6.1.1 Minimizing the Effect of High Input Source Resistance ....................................12-11
12.6.1.2 Suggested A/D Input Circuit .............................................................................12-12
12.6.1.3 Analog Ground and Reference Voltages .........................................................12-12