H8S-2639 Datasheet, PDF (54/1547 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer

21C.13.2 Programmer Mode Operation ....................................................................... 909
21C.13.3 Memory Read Mode..................................................................................... 910
21C.13.4 Auto-Program Mode..................................................................................... 914
21C.13.5 Auto-Erase Mode.......................................................................................... 916
21C.13.6 Status Read Mode......................................................................................... 918
21C.13.7 Status Polling................................................................................................ 919
21C.13.8 Programmer Mode Transition Time ............................................................. 919
21C.13.9 Notes on Memory Programming .................................................................. 920
21C.14 Flash Memory and Power-Down States ........................................................................ 921
21C.14.1 Notes on Power-Down States ....................................................................... 922
21C.15 Flash Memory Programming and Erasing Precautions ................................................. 922
21C.16 Note on Switching from F-ZTAT Version to Mask ROM Version .............................. 928
Section 22A Clock Pulse Generator (H8S/2636 Group, H8S/2638 Group,
H8S/2630 Group) ....................................................................................... 929
22A.1 Overview....................................................................................................................... 929
22A.1.1 Block Diagram.............................................................................................. 929
22A.1.2 Register Configuration ................................................................................. 930
22A.2 Register Descriptions .................................................................................................... 930
22A.2.1 System Clock Control Register (SCKCR).................................................... 930
22A.2.2 Low-Power Control Register (LPWRCR).................................................... 931
22A.3 Oscillator....................................................................................................................... 932
22A.3.1 Connecting a Crystal Resonator ................................................................... 932
22A.3.2 External Clock Input..................................................................................... 935
22A.4 PLL Circuit.................................................................................................................... 937
22A.5 Medium-Speed Clock Divider....................................................................................... 938
22A.6 Bus Master Clock Selection Circuit .............................................................................. 938
22A.7 Subclock Oscillator ....................................................................................................... 938
22A.8 Subclock Waveform Generation Circuit ....................................................................... 939
22A.9 Note on Crystal Resonator ............................................................................................ 939
Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)....... 941
22B.1 Overview....................................................................................................................... 941
22B.1.1 Block Diagram.............................................................................................. 941
22B.1.2 Register Configuration ................................................................................. 942
22B.2 Register Descriptions .................................................................................................... 942
22B.2.1 System Clock Control Register (SCKCR).................................................... 942
22B.2.2 Low-Power Control Register (LPWRCR).................................................... 943
22B.3 Oscillator....................................................................................................................... 944
22B.3.1 Connecting a Crystal Resonator ................................................................... 944
Rev. 6.00 Feb 22, 2005 page liv of lx