HD64F2145 datasheet(21/829 Pages) RENESAS

21 / 829 page

Rev. 2.0, 08/02, page xix of xxxviii

19.4.3 A20 Gate ..............................................................................................................539

19.4.4 Host Interface Shutdown Function (LPCPD) .......................................................542

19.4.5 Host Interface Serialized Interrupt Operation (SERIRQ).....................................546

19.4.6 Host Interface Clock Start Request (CLKRUN) ..................................................548

19.5

Interrupt Sources ...............................................................................................................548

19.5.1 IBFI1, IBFI2, IBFI3, and ERRI............................................................................548

19.5.2 SMI, HIRQ1, HIRQ6, HIRQ9, HIRQ10, HIRQ11, and HIRQ12 ........................549

19.6

Usage Notes.......................................................................................................................551

19.6.1 Module Stop Mode Setting...................................................................................551

19.6.2 Notes on Using Host Interface .............................................................................551

Section 20 D/A Converter .................................................................................553

20.1

Features .............................................................................................................................553

20.2

Input/Output Pins ..............................................................................................................554

20.3

Register Descriptions.........................................................................................................554

20.3.1 D/A Data Registers 0 and 1 (DADR0, DADR1)..................................................554

20.3.2 D/A Control Register (DACR).............................................................................555

20.4

Operation ...........................................................................................................................556

20.5

Usage Note ........................................................................................................................557

20.5.1 Module Stop Mode Setting...................................................................................557

Section 21 A/D Converter .................................................................................559

21.1

Features .............................................................................................................................559

21.2

Input/Output Pins ..............................................................................................................561

21.3

Register Descriptions.........................................................................................................562

21.3.1 A/D Data Registers A to D (ADDRA to ADDRD) ..............................................562

21.3.2 A/D Control/Status Register (ADCSR)................................................................563

21.3.3 A/D Control Register (ADCR).............................................................................564

21.3.4 Keyboard Comparator Control Register (KBCOMP) ..........................................565

21.4

Operation ...........................................................................................................................566

21.4.1 Single Mode .........................................................................................................566

21.4.2 Scan Mode............................................................................................................566

21.4.3 Input Sampling and A/D Conversion Time..........................................................568

21.4.4 External Trigger Input Timing .............................................................................569

21.5

Interrupt Sources ...............................................................................................................569

21.6

A/D Conversion Accuracy Definitions..............................................................................570

21.7

Usage Notes.......................................................................................................................572

21.7.1 Permissible Signal Source Impedance..................................................................572

21.7.2 Influences on Absolute Accuracy.........................................................................572

21.7.3 Setting Range of Analog Power Supply and Other Pins ......................................573

21.7.4 Notes on Board Design ........................................................................................573

21.7.5 Notes on Noise Countermeasures.........................................................................573

21.7.6 Module Stop Mode Setting...................................................................................574

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