Advertisement
6.8
Bus Arbitration .................................................................................................................. 155
6.8.1
Overview .............................................................................................................. 155
6.8.2
Operation .............................................................................................................. 155
6.8.3
Bus Mastership Transfer Timing .......................................................................... 156
Section 7 Data Transfer Controller (DTC)........................................................ 159
7.1
Features.............................................................................................................................. 159
7.2
Register Descriptions......................................................................................................... 161
7.2.1
Dtc Mode Register A (Mra) ............................................................................. 162
7.2.2
Dtc Mode Register B (Mrb).............................................................................. 163
7.2.3
DTC Source Address Register (SAR)................................................................... 163
7.2.4
DTC Destination Address Register (DAR)........................................................... 163
7.2.5
Dtc Transfer Count Register A (Cra) ............................................................... 164
7.2.6
Dtc Transfer Count Register B (CRB)................................................................ 164
7.2.7
DTC Enable Registers (DTCER).......................................................................... 164
7.2.8
Dtc Vector Register (Dtvecr)......................................................................... 165
7.2.9
Keyboard Comparator Control Register (Kbcomp)........................................... 166
7.2.10 Event Counter Control Register (ECCR).............................................................. 167
7.2.11 Event Counter Status Register (ECS) ................................................................... 168
7.3
Dtc Event Counter ........................................................................................................... 169
7.3.1
Event Counter Handling Priority .......................................................................... 170
7.3.2
Usage Notes .......................................................................................................... 171
7.4
Activation Sources............................................................................................................. 171
7.5
Location Of Register Information And Dtc Vector Table ................................................. 173
7.6
Operation ........................................................................................................................... 175
7.6.1
Normal Mode........................................................................................................ 176
7.6.2
Repeat Mode......................................................................................................... 177
7.6.3
Block Transfer Mode ............................................................................................ 178
7.6.4
Chain Transfer ...................................................................................................... 179
7.6.5
Interrupt Sources................................................................................................... 180
7.6.6
Operation Timing.................................................................................................. 180
7.6.7
Number Of Dtc Execution States ........................................................................ 182
7.7
Procedures For Using Dtc................................................................................................. 183
7.7.1
Activation by Interrupt.......................................................................................... 183
7.7.2
Activation by Software ......................................................................................... 183
7.8
Examples Of Use Of The Dtc ............................................................................................. 184
7.8.1
Normal Mode........................................................................................................ 184
7.8.2
Software Activation .............................................................................................. 185
7.9
Usage Notes ....................................................................................................................... 186
7.9.1
Module Stop Mode Setting ................................................................................... 186
Rev. 1.00 Mar. 12, 2008 Page xii of xIviii
Advertisement
