HD64336048 datasheet(10/562 Pages) RENESAS

Part #	HD64336048

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

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Manufacturer	RENESAS [Renesas Technology Corp]

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Rev. 3.00 Mar. 15, 2006 Page x of xxxii

3.2.4

Interrupt Enable Register 2 (IENR2) .................................................................. 50

3.2.5

Interrupt Flag Register 1 (IRR1)......................................................................... 50

3.2.6

Interrupt Flag Register 2 (IRR2)......................................................................... 52

3.2.7

Wakeup Interrupt Flag Register (IWPR) ............................................................ 53

3.3

Reset Exception Handling .................................................................................................. 54

3.4

Interrupt Exception Handling ............................................................................................. 55

3.4.1

External Interrupts .............................................................................................. 55

3.4.2

Internal Interrupts ............................................................................................... 57

3.4.3

Interrupt Handling Sequence .............................................................................. 57

3.4.4

Interrupt Response Time..................................................................................... 59

3.5

Usage Notes ........................................................................................................................ 61

3.5.1

Interrupts after Reset........................................................................................... 61

3.5.2

Notes on Stack Area Use .................................................................................... 61

3.5.3

Notes on Rewriting Port Mode Registers ........................................................... 61

Section 4 Address Break ..................................................................................... 63

4.1

Register Descriptions.......................................................................................................... 64

4.1.1

Address Break Control Register (ABRKCR) ..................................................... 64

4.1.2

Address Break Status Register (ABRKSR) ........................................................ 66

4.1.3

Break Address Registers E, H, L (BARE, BARH, BARL) ................................ 66

4.1.4

Break Data Registers H, L (BDRH, BDRL) ....................................................... 66

4.2

Operation ............................................................................................................................ 67

Section 5 Clock Pulse Generators ....................................................................... 69

5.1

System Clock Generator ..................................................................................................... 70

5.1.1

Connecting Crystal Resonator ............................................................................ 70

5.1.2

Connecting Ceramic Resonator .......................................................................... 71

5.1.3

External Clock Input Method.............................................................................. 71

5.2

Subclock Generator ............................................................................................................ 72

5.2.1

Connecting 32.768-kHz Crystal Resonator ........................................................ 72

5.2.2

Pin Connection when not Using Subclock.......................................................... 73

5.3

Prescalers ............................................................................................................................ 73

5.3.1

Prescaler S .......................................................................................................... 73

5.3.2

Prescaler W......................................................................................................... 73

5.4

Usage Notes ........................................................................................................................ 74

5.4.1

Notes on Resonators ........................................................................................... 74

5.4.2

Notes on Board Design ....................................................................................... 74

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