HD64F2638F20J Datasheet, PDF (46/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

22A.4
22A.5
22A.6
22A.7
22A.8
22A.9
22A.3.2 External Clock Input..................................................................................... 909
PLL Circuit.................................................................................................................... 911
Medium-Speed Clock Divider....................................................................................... 912
Bus Master Clock Selection Circuit .............................................................................. 912
Subclock Oscillator ....................................................................................................... 912
Subclock Waveform Generation Circuit ....................................................................... 913
Note on Crystal Resonator ............................................................................................ 913
Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)....... 915
22B.1 Overview ....................................................................................................................... 915
22B.1.1 Block Diagram.............................................................................................. 915
22B.1.2 Register Configuration.................................................................................. 916
22B.2 Register Descriptions .................................................................................................... 916
22B.2.1 System Clock Control Register (SCKCR).................................................... 916
22B.2.2 Low-Power Control Register (LPWRCR) .................................................... 917
22B.3 Oscillator ....................................................................................................................... 918
22B.3.1 Connecting a Crystal Resonator ................................................................... 918
22B.3.2 External Clock Input..................................................................................... 921
22B.4 PLL Circuit.................................................................................................................... 923
22B.5 Medium-Speed Clock Divider....................................................................................... 923
22B.6 Bus Master Clock Selection Circuit .............................................................................. 923
22B.7 Subclock Divider........................................................................................................... 924
22B.8 Note on Resonator ......................................................................................................... 924
Section 23A Power-Down Modes
[HD64F2636F, HD64F2638F, HD6432636F, HD6432638F,
HD64F2630F, HD6432630F, HD64F2635F, HD6432635F,
HD6432634F] .............................................................................................. 925
23A.1 Overview ....................................................................................................................... 925
23A.1.1 Register Configuration.................................................................................. 929
23A.2 Register Descriptions .................................................................................................... 930
23A.2.1 Standby Control Register (SBYCR) ............................................................. 930
23A.2.2 System Clock Control Register (SCKCR).................................................... 931
23A.2.3 Low-Power Control Register (LPWRCR) .................................................... 933
23A.2.4 Timer Control/Status Register (TCSR)......................................................... 933
23A.2.5 Module Stop Control Register (MSTPCR)................................................... 934
23A.3 Medium-Speed Mode.................................................................................................... 936
23A.4 Sleep Mode.................................................................................................................... 937
23A.4.1 Sleep Mode................................................................................................... 937
23A.4.2 Exiting Sleep Mode ...................................................................................... 937
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REJ09B0103-0800 Rev. 8.00
May 28, 2010