
Table of Contents
ii
6.2.2 Power Reduction for Peripheral Modules............................................................................................ 6-5
6.3 Power-On Sequence....................................................................................................................................... 6-6
7. External Bus Controller.......................................................................................................................................... 7-1
7.1 Features.......................................................................................................................................................... 7-1
7.2 Block Diagram............................................................................................................................................... 7-2
7.3 Detailed Explanation...................................................................................................................................... 7-3
7.3.1 External Bus Control Register............................................................................................................. 7-3
7.3.2 Global/Boot-up Options....................................................................................................................... 7-4
7.3.3 Address Mapping................................................................................................................................. 7-5
7.3.4 External Address Output...................................................................................................................... 7-6
7.3.5 Data Bus Size....................................................................................................................................... 7-7
7.3.6 Access Mode........................................................................................................................................ 7-9
7.3.7 Access Timing ................................................................................................................................... 7-13
7.3.8 Clock Options.................................................................................................................................... 7-19
7.4 Register........................................................................................................................................................ 7-20
7.4.1 External Bus Channel Control Register (EBCCRn) 0x9000 (ch. 0), 0x9008 (ch. 1)
0x9010 (ch. 2), 0x9018 (ch. 3) 0x9020 (ch. 4), 0x9028 (ch. 5) 0x9030 (ch. 6), 0x9038 (ch. 7)...... 7-21
7.5 Timing Diagrams ......................................................................................................................................... 7-24
7.5.1 ACE* Signal...................................................................................................................................... 7-25
7.5.2 Normal mode access (Single, 32-bit Bus).......................................................................................... 7-27
7.5.3 Normal mode access (Burst, 32-bit Bus)........................................................................................... 7-31
7.5.4 Normal Mode Access (Single, 16-bit bus).........................................................................................7-33
7.5.5 Normal Mode Access (Burst, 16-bit Bus)..........................................................................................7-37
7.5.6 Normal Mode Access (Single, 8-bit Bus) ..........................................................................................7-39
7.5.7 Normal Mode Access (Burst, 8-bit Bus)............................................................................................ 7-42
7.5.8 Page Mode Access (Burst, 32-bit Bus).............................................................................................. 7-44
7.5.9 External ACK Mode Access (32-bit Bus).......................................................................................... 7-46
7.5.10 READY Mode Access (32-bit Bus)................................................................................................... 7-52
7.6 Flash ROM, SRAM Usage Example ........................................................................................................... 7-54
8. DMA Controller...................................................................................................................................................... 8-1
8.1 Features.......................................................................................................................................................... 8-1
8.2 Block Diagram............................................................................................................................................... 8-2
8.3 Detailed Explanation...................................................................................................................................... 8-4
8.3.1 Transfer Mode...................................................................................................................................... 8-4
8.3.2 On-chip Registers ................................................................................................................................ 8-5
8.3.3 External I/O DMATransfer Mode....................................................................................................... 8-5
8.3.4 Internal I/O DMATransfer Mode........................................................................................................8-8
8.3.5 Memory-Memory Copy Mode............................................................................................................. 8-9
8.3.6 Memory Fill Transfer Mode ................................................................................................................ 8-9
8.3.7 Single Address Transfer....................................................................................................................... 8-9
8.3.8 Dual Address Transfer ....................................................................................................................... 8-12
8.3.9 DMATransfer.................................................................................................................................... 8-17
8.3.10 Chain DMA Transfer ......................................................................................................................... 8-18
8.3.11 Dynamic Chain Operation ................................................................................................................. 8-20
8.3.12 Interrupts............................................................................................................................................ 8-21
8.3.13 Transfer Stall Detection Function...................................................................................................... 8-21
8.3.14 Arbitration Among DMA Channels................................................................................................... 8-22
8.3.15 Restrictions in Access to PCI Bus...................................................................................................... 8-22
8.4 DMA Controller Registers........................................................................................................................... 8-23
8.4.1 DMA Master Control Register (DM0MCR, DM1MCR)...................................................................8-25
8.4.2 DMA Channel Control Register (DM0CCRn, DM1CCRn).............................................................. 8-27
8.4.3 DMA Channel Status Register (DM0CSRn, DM1CSRn)) ................................................................8-31
8.4.4 DMA Source Address Register (DM0SARn, DM1SARn) ................................................................ 8-33
8.4.5 DMA Destination Address Register (DM0DARn, DM1DARn)........................................................ 8-34
8.4.6 DMA Chain Address Register (DM0CHARn, DM1CHARn)........................................................... 8-35
8.4.7 DMA Source Address Increment Register (DM0SAIRn, DM1SAIRn)............................................. 8-36