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MC68HC705SJ7CDW Datasheet(PDF) 11 Page - Motorola, Inc |
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MC68HC705SJ7CDW Datasheet(HTML) 11 Page - Motorola, Inc |
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11 / 242 page  Table of Contents MC68HC705JJ7 • MC68HC705JP7 — REV 4 Advance Information MOTOROLA Table of Contents 11 7.5 Port C (28-Pin Versions Only) . . . . . . . . . . . . . . . . . . . . . . . . 101 7.5.1 Port C Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 7.5.2 Data Direction Register C. . . . . . . . . . . . . . . . . . . . . . . . . . 102 7.5.3 Port C Pulldown Devices . . . . . . . . . . . . . . . . . . . . . . . . . .103 7.5.4 Port C Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 7.6 Port Transitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105 Section 8. Analog Subsystem 8.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 8.3 Analog Multiplex Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 8.4 Analog Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 8.5 Analog Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 8.6 A/D Conversion Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 8.7 Voltage Measurement Methods . . . . . . . . . . . . . . . . . . . . . . . 132 8.7.1 Absolute Voltage Readings . . . . . . . . . . . . . . . . . . . . . . . . 133 8.7.1.1 Internal Absolute Reference . . . . . . . . . . . . . . . . . . . . . 133 8.7.1.2 External Absolute Reference . . . . . . . . . . . . . . . . . . . . . 134 8.7.2 Ratiometric Voltage Readings . . . . . . . . . . . . . . . . . . . . . . 134 8.7.2.1 Internal Ratiometric Reference . . . . . . . . . . . . . . . . . . .135 8.7.2.2 External Ratiometric Reference . . . . . . . . . . . . . . . . . . . 136 8.8 Voltage Comparator Features . . . . . . . . . . . . . . . . . . . . . . . . 136 8.8.1 Voltage Comparator 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 8.8.2 Voltage Comparator 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 8.9 Current Source Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 8.10 Internal Temperature Sensing Diode Features. . . . . . . . . . . . 138 8.11 Sample and Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 8.12 Port B Interaction with Analog Inputs . . . . . . . . . . . . . . . . . . .139 8.13 Port B Pins as Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 8.14 Port B Pulldowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 8.15 Noise Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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