EM78P372N数据手册(5)

EM78P372N数据手册

Contents6.9Timer/Counter................................................................................................... 586.9.1 6.9.2 6.9.3 6.9.4 6.10.1 6.10.2 6.10.3 6.10.4 6.10.5 6.11.1 6.11.2 6.11.3 6.11.4 Overview ...........................................................................................................58 Functional Description.......................................................................................59 Programming the Related Registers .................................................................59 Timer Programming Process/Steps...................................................................60 External Reference Signal ................................................................................60 Comparator Outputs..........................................................................................60 Using Comparator as an Operation Amplifier....................................................61 Comparator Interrupt .........................................................................................61 Wake-up from Sleep Mode................................................................................62 Oscillator Modes................................................................................................62 Crystal Oscillator/Ceramic Resonators (Crystal)...............................................64 External RC Oscillator Mode.............................................................................67 Internal RC Oscillator Mode ..............................................................................686.10 Comparator ...................................................................................................... 606.11 Oscillator .......................................................................................................... 626.12 Power-on Considerations ................................................................................. 686.12.1 Programmable WDT Time-out Period ...............................................................68 6.12.2 External Power-on Reset Circuit .......................................................................69 6.12.3 Residual Voltage Protection ..............................................................................696.13 Code Option ..................................................................................................... 706.13.1 Code Option Register (Word 0).........................................................................70 6.13.2 Code Option Register (Word 1).........................................................................72 6.13.3 Customer ID Register (Word 2).........................................................................736.14 Low Voltage Detector/Low Voltage Reset ........................................................ 746.14.1 Low Voltage Reset ............................................................................................74 6.14.2 Low Voltage Detector ........................................................................................74 6.14.2.1 Bank 1 RE (LVD Interrupt and Wake-up Register).............................74 6.14.2.2 Bank 0 RE (Interrupt Status 2 and Wake-up Control Register)..........75 6.14.3 Programming Process.......................................................................................766.15 Instruction Set .................................................................................................. 77 7 8 Absolute Maximum Ratings ................................................................................... 79 DC Electrical Characteristics ................................................................................. 79 8.1 8.2 8.3 8.4 9 10 AD Converter Characteristics........................................................................... 81 Comparator Characteristics.............................................................................. 82 OP Characteristics............................................................................................ 82 VREF 2V/3V/4V Characteristics....................................................................... 83AC Electrical Characteristics ................................................................................. 84 Timing Diagrams ..................................................................................................... 85Product Specification (V1.1) 05.24.2011 v

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