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2 / 84 page 2/84 Table of Contents 95 1 GENERAL DESCRIPTION . . . . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . . . . . . 4 1.1 INTRODUCTION . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. . 4 1.2 PIN DESCRIPTION . . .... . ... .. . . ... .. . .... . ... .. .. .. .... . . . ... . . . . . . . . ... 5 1.3 EXTERNAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... . 9 1.4 MEMORY MAP . . . . . . . . . . .... . ... ... . . . .... .... .. . . . . . . . . . . . . . ... .. . .... 10 2 CENTRAL PROCESSING UNIT . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . . . . . 13 2.1 INTRODUCTION . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 13 2.2 MAIN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . . 13 2.3 CPU REGISTERS . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 13 3 CLOCKS, RESET, INTERRUPTS & POWER SAVING MODES . . . . . . . . . . . . . .... . . ... .. 16 3.1 CLOCK SYSTEM . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 16 3.1.1 General Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 16 3.2 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . . 17 3.2.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 17 3.2.2 External Reset . . . . . . .... . ... .. . . . . .... .... .. . . . . . . . . . . . . . ... .. . .... 17 3.2.3 Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . . ... . ... .. . . ... .. . . . 17 3.2.4 Power-on Reset .... .... .. . . . . . . . . .... . ... .. .. .. . . . . . . . ... . . . . . . . . . . 17 3.3 INTERRUPTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.4 POWER SAVING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... 21 3.4.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 21 3.4.2 Slow Mode . . . . . . . . . . . . . . . . . . . . . . . .... . . . ... . . . . . . . . . . . . . ... ... . . . . 21 3.4.3 Wait Mode . . . . . . . . . . . . . . . . . . . ... . . . . ... .. ... .. .. ... .. . ... .. . . ... . . 21 3.4.4 Halt Mode . . . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 22 3.5 MISCELLANEOUS REGISTER . . . . . . . . . . . . . . ... . . . . . . . . . .... ... . . . . . . . . . . . . 23 4 ON-CHIP PERIPHERALS . . . . . . . . . . . .... . . ... .. .... ... . . . . . . . . . . . . . . . . . . . . ... .. 24 4.1 I/O PORTS . . . . . . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 24 4.1.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 24 4.1.2 Functional Description . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 24 4.1.3 I/O Port Implementation . . . . . . . . . . . . . . . . . . . .... . . . .... .... .. . .... .. . . . 25 4.1.4 Register Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 28 4.2 WATCHDOG TIMER (WDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.2.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 30 4.2.2 Main Features . . . . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . .... 30 4.2.3 Functional Description . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 31 4.2.4 Low Power Modes . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . . . . . 31 4.2.5 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . .... . . . ... . . . . . . . . . . . . . ... ... . . . . 31 4.2.6 Register Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 31 4.3 16-BIT TIMER . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ... .. . . ... .. 32 4.3.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 32 4.3.2 Main Features . . . . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . .... 32 4.3.3 Functional Description . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 32 4.3.4 Low Power Modes . . .... . ... .. . . . . . ... . ... .. . . ... .. . .... . ... .. . . ... 43 4.3.5 Interrupts . . . . . .... . . . . .. . . . . . . . . .... . ... .. .. .. . .... ... . . . . . . . . . . . . 43 4.3.6 Register Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 44 2 |
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