Hitachi H8/3048 Hardware Manual page 13

18.4.1 Flash Memory Operation................................................................................ 569
18.4.2 Mode Programming and Flash Memory Address Space ................................ 570
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18.4.3 Features........................................................................................................... 570
18.4.4 Block Diagram................................................................................................ 572
18.4.5 Input/Output Pins............................................................................................ 573
18.4.6 Register Configuration.................................................................................... 573
18.5 Flash Memory Register Descriptions ............................................................................. 574
18.5.1 Flash Memory Control Register ..................................................................... 574
18.5.2 Erase Block Register 1.................................................................................... 577
18.5.3 Erase Block Register 2.................................................................................... 578
18.5.4 RAM Control Register (RAMCR).................................................................. 580
18.6 On-Board Programming Modes ..................................................................................... 582
18.6.1 Boot Mode ...................................................................................................... 582
18.6.2 User Program Mode........................................................................................ 587
18.7 Programming and Erasing Flash Memory...................................................................... 589
18.7.1 Program Mode ................................................................................................ 590
18.7.2 Program-Verify Mode..................................................................................... 590
18.7.3 Programming Flowchart and Sample Program............................................... 591
18.7.4 Erase Mode ..................................................................................................... 593
18.7.5 Erase-Verify Mode.......................................................................................... 594
18.7.6 Erasing Flowchart and Sample Program ........................................................ 595
18.7.7 Prewrite-Verify Mode ..................................................................................... 607
18.7.8 Protect Modes ................................................................................................. 607
18.7.9 NMI Input Masking ........................................................................................ 610
18.8 Flash Memory Emulation by RAM ................................................................................ 611
18.9 PROM Mode................................................................................................................... 613
18.9.1 PROM Mode Setting ...................................................................................... 613
18.9.2 Socket Adapter and Memory Map.................................................................. 614
18.9.3 Operation in PROM Mode.............................................................................. 616
18.10 Flash Memory Programming and Erasing Precautions .................................................. 624
Section 19 Clock Pulse Generator
19.1 Overview......................................................................................................................... 633
19.1.1 Block Diagram................................................................................................ 633
19.2 Oscillator Circuit ............................................................................................................ 634
19.2.1 Connecting a Crystal Resonator ..................................................................... 634
19.2.2 External Clock Input....................................................................................... 636
19.3 Duty Adjustment Circuit................................................................................................. 639
19.4 Prescalers ........................................................................................................................ 639
19.5 Frequency Divider .......................................................................................................... 639
19.5.1 Register Configuration.................................................................................... 639
............................................................................. 633