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M30624FGFP Datasheet(PDF) 11 Page - Renesas Technology Corp |
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M30624FGFP Datasheet(HTML) 11 Page - Renesas Technology Corp |
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11 / 621 page  4.2.1 Interrupt Enable Flag ........................................................................................................... 493 4.2.2 Interrupt Request Bit ............................................................................................................ 493 4.2.3 Changing the Interrupt Control Register .............................................................................. 494 4.2.4 Interrupt Priority Level Select Bit and Processor Interrupt Priority Level (IPL) .................... 495 4.3 Interrupt Sequence ..................................................................................................................... 496 4.3.1 Interrupt Response Time ..................................................................................................... 496 4.3.2 Variation of IPL when Interrupt Request is Accepted .......................................................... 497 4.3.3 Saving Registers .................................................................................................................. 498 4.4 Returning from an Interrupt Routine ........................................................................................... 500 4.5 Interrupt Priority .......................................................................................................................... 500 4.6 Multiple Interrupts ....................................................................................................................... 502 4.7 Precautions for Interrupts ........................................................................................................... 504 Chapter 5 External Buses __________________________________ 5.1 Overview of External Buses ........................................................................................................ 508 5.2 Data Access ................................................................................................................................ 509 5.2.1 Data Bus Width .................................................................................................................... 509 5.2.2 Chip Selects and Address Bus ............................................................................................ 510 5.2.3 Bus Types ........................................................................................................................... 511 5.2.4 R/W Modes ......................................................................................................................... 511 5.3 Memory Space Expansion Features ........................................................................................... 512 5.3.1 Normal Mode ....................................................................................................................... 513 5.3.2 Memory Space Expansion Mode 1 ...................................................................................... 514 5.3.3 Memory Space Expansion Mode 2 ..................................................................................... 515 5.4 Connection Examples ................................................................................................................. 521 5.4.1 16-bit Memory to 16-bit Width Data Bus Connection Example ............................................ 521 5.4.2 8-bit Memory to 16-bit Width Data Bus Connection Example .............................................. 522 5.4.3 8-bit Memory to 8-bit Width Data Bus Connection Example ............................................... 524 5.4.4 Two 8-bit and 16-Bit Memory to 16-Bit Width Data Bus Connection Example .................... 525 5.4.5 16-bit Width Data Bus Connection Example in Memory Space Expansion Mode 1 ............ 526 5.4.6 8-bit Width Data Bus Connection Example in Memory Space Expansion Mode 1 ............. 527 5.4.7 8-bit Width Data Bus Connection Example in Memory Space Expansion Mode 2 ............. 528 5.4.8 Chip Selects and Address Bus ............................................................................................ 529 5.5 Connectable Memories ............................................................................................................... 530 5.5.1 Operation Frequency and Access Time .............................................................................. 530 |
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