
Rev. 2.0, 09/02, page xiii of xxxviii
9.7
Waits between Access Cycles...........................................................................................142
9.7.1
Prevention of Data Bus Conflicts.........................................................................142
9.7.2
Simplification of Bus Cycle Start Detection........................................................143
Bus Arbitration..................................................................................................................144
Memory Connection Example ..........................................................................................145
Access to On-chip Peripheral I/O Registers......................................................................148
Cycles of No-Bus Mastership Release..............................................................................148
CPU Operation When Program Is Located in External Memory......................................148
9.8
9.9
9.10
9.11
9.12
Section 10 Direct Memory Access Controller (DMAC) .................................. 149
10.1
Features.............................................................................................................................149
10.2
Input/Output Pins..............................................................................................................151
10.3
Register Descriptions........................................................................................................151
10.3.1 DMA Source Address Registers_0 to 3 (SAR_0 to SAR_3)...............................152
10.3.2 DMA Destination Address Registers_0 to 3 (DAR_0 to DAR_3).......................152
10.3.3 DMA Transfer Count Registers_0 to 3 (DMATCR_0 to DMATCR_3)..............153
10.3.4 DMA Channel Control Registers_0 to 3 (CHCR_0 to CHCR_3)........................153
10.3.5 DMAC Operation Register (DMAOR)................................................................159
10.4
Operation...........................................................................................................................161
10.4.1 DMA Transfer Flow ............................................................................................161
10.4.2 DMA Transfer Requests ......................................................................................163
10.4.3 Channel Priority...................................................................................................165
10.4.4 DMA Transfer Types...........................................................................................168
10.4.5 Number of Bus Cycle States and
DREQ
Pin Sample Timing..............................177
10.4.6 Source Address Reload Function.........................................................................182
10.4.7 DMA Transfer Ending Conditions.......................................................................184
10.4.8 DMAC Access from CPU....................................................................................185
10.5
Examples of Use...............................................................................................................185
10.5.1 Example of DMA Transfer between On-Chip SCI and External Memory..........185
10.5.2 Example of DMA Transfer between External RAM and External Device
with DACK..........................................................................................................186
10.5.3 Example of DMA Transfer between A/D Converter and On-chip Memory
(Address Reload On)............................................................................................186
10.5.4 Example of DMA Transfer between External Memory and SCI1 Transmit Side
(Indirect Address On)...........................................................................................188
10.6
Cautions on Use................................................................................................................190
Section 11 Multi-Function Timer Pulse Unit (MTU)....................................... 191
11.1
Features.............................................................................................................................191
11.2
Input/Output Pins..............................................................................................................195
11.3
Register Descriptions........................................................................................................196
11.3.1 Timer Control Register (TCR).............................................................................198
11.3.2 Timer Mode Register (TMDR)............................................................................202