M16C6N5 View Datasheet(PDF) - Renesas Electronics
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M16C6N5 Datasheet PDF : 400 Pages
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7.2 Bus Control ................................................................................................................................................ 36
7.2.1 Address Bus ....................................................................................................................................... 36
7.2.2 Data Bus ............................................................................................................................................ 36
7.2.3 Chip Select Signal .............................................................................................................................. 36
7.2.4 Read and Write Signals ..................................................................................................................... 38
7.2.5 ALE Signal ......................................................................................................................................... 38
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7.2.6 The RDY Signal ................................................................................................................................. 39
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7.2.7 HOLD Signal ...................................................................................................................................... 40
7.2.8 BCLK Output ...................................................................................................................................... 40
7.2.9 External Bus Status When Internal Area Accessed ........................................................................... 42
7.2.10 Software Wait ................................................................................................................................... 42
8. Clock Generating Circuit ..................................................................................................... 46
8.1 Types of Clock Generating Circuit ............................................................................................................. 46
8.1.1 Main Clock ......................................................................................................................................... 53
8.1.2 Sub Clock ........................................................................................................................................... 54
8.1.3 On-chip Oscillator Clock .................................................................................................................... 55
8.1.4 PLL Clock ........................................................................................................................................... 55
8.2 CPU Clock and Peripheral Function Clock ................................................................................................ 57
8.2.1 CPU Clock and BCLK ........................................................................................................................ 57
8.2.2 Peripheral Function Clock .................................................................................................................. 57
8.3 Clock Output Function ............................................................................................................................... 57
8.4 Power Control ............................................................................................................................................ 58
8.4.1 Normal Operation Mode ..................................................................................................................... 58
8.4.2 Wait Mode .......................................................................................................................................... 60
8.4.3 Stop Mode .......................................................................................................................................... 62
8.5 Oscillation Stop and Re-oscillation Detection Function ............................................................................. 67
8.5.1 Operation When CM27 Bit = 0 (Oscillation Stop Detection Reset) .................................................... 67
8.5.2 Operation When CM27 Bit = 1 (Oscillation Stop, Re-oscillation Detection Interrupt) ........................ 67
8.5.3 How to Use Oscillation Stop and Re-oscillation Detection Function .................................................. 68
9. Protection ............................................................................................................................ 69
10. Interrupt ............................................................................................................................. 70
10.1 Type of Interrupts ..................................................................................................................................... 70
10.2 Software Interrupts ................................................................................................................................... 71
10.2.1 Undefined Instruction Interrupt ......................................................................................................... 71
10.2.2 Overflow Interrupt ............................................................................................................................ 71
10.2.3 BRK Interrupt ................................................................................................................................... 71
10.2.4 INT Instruction Interrupt ................................................................................................................... 71
10.3 Hardware Interrupts ................................................................................................................................. 72
10.3.1 Special Interrupts ............................................................................................................................. 72
10.3.2 Peripheral Function Interrupts .......................................................................................................... 72
10.4 Interrupts and Interrupt Vector ................................................................................................................. 73
10.4.1 Fixed Vector Tables .......................................................................................................................... 73
10.4.2 Relocatable Vector Tables ............................................................................................................... 74
10.5 Interrupt Control ....................................................................................................................................... 75
10.5.1 I Flag ................................................................................................................................................ 77
10.5.2 IR Bit ................................................................................................................................................ 77
10.5.3 ILVL2 to ILVL0 Bits and IPL ............................................................................................................. 77
A-2
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