Renesas H8/325 Series Manual Pagina 6

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Rev. 3.0, 09/98, page iii of viii
3.2 System Control Register (SYSCR)
H'FFC4................................................................... 54
3.3 Mode Control Register (MDCR)
H'FFC5 ...................................................................... 56
3.4 Address Space Map........................................................................................................... 57
Section 4 Exception Handling
........................................................................................ 61
4.1 Overview ........................................................................................................................... 61
4.2 Reset.................................................................................................................................. 61
4.2.1 Overview.............................................................................................................. 61
4.2.2 Reset Sequence..................................................................................................... 61
4.2.3 Disabling of Interrupts after Reset ....................................................................... 64
4.3 Interrupts ........................................................................................................................... 64
4.3.1 Overview.............................................................................................................. 64
4.3.2 Interrupt-Related Registers................................................................................... 66
4.3.3 External Interrupts................................................................................................ 68
4.3.4 Internal Interrupts................................................................................................. 68
4.3.5 Interrupt Handling................................................................................................ 68
4.3.6 Interrupt Response Time ...................................................................................... 74
4.3.7 Precaution............................................................................................................. 75
4.4 Note on Stack Handling..................................................................................................... 76
Section 5 Clock Pulse Generator
................................................................................... 77
5.1 Overview ........................................................................................................................... 77
5.1.1 Block Diagram ..................................................................................................... 77
5.2 Oscillator Circuit ............................................................................................................... 78
5.3 System Clock Divider........................................................................................................ 80
Section 6 I/O Ports
............................................................................................................ 81
6.1 Overview ........................................................................................................................... 81
6.2 Port 1 ................................................................................................................................. 84
6.3 Port 2 ................................................................................................................................. 88
6.4 Port 3 ................................................................................................................................. 92
6.5 Port 4 ................................................................................................................................. 96
6.6 Port 5 ................................................................................................................................. 100
6.7 Port 6 ................................................................................................................................. 105
6.8 Port 7 ................................................................................................................................. 111
6.9 Port 8 ................................................................................................................................. 113
6.10 Port 9 ................................................................................................................................. 119
Section 7 16-Bit Free-Running Timer
......................................................................... 127
7.1 Overview ........................................................................................................................... 127
7.1.1 Features ................................................................................................................ 127
7.1.2 Block Diagram ..................................................................................................... 127
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