![](http://datasheet.mmic.net.cn/370000/-PD30101_datasheet_16680756/-PD30101_17.png)
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20.2.6 SIURS232CREG.............................................................................................................. 321
20.2.7 SIUBAUDSELREG........................................................................................................... 322
20.3 REGISTER SETTING FLOW............................................................................... 323
20.4 OPERATION OF THE SIU................................................................................... 325
CHAPTER 21 AIU (AUDIO INTERFACE UNIT).................................................. 327
21.1 GENERAL........................................................................................................... 327
21.2 REGISTER SET .................................................................................................. 328
21.2.1 AIUDATREG .................................................................................................................... 329
21.2.2 AIURESETREG................................................................................................................ 330
21.2.3 AIUMODEREG................................................................................................................. 331
21.2.4 AIUSEQENREG............................................................................................................... 332
21.2.5 AIUMUTEREG ................................................................................................................. 333
21.2.6 AIUSTATREG .................................................................................................................. 334
21.2.7 AIUSTPPAGEREG........................................................................................................... 335
21.2.8 AIUVALIDREG................................................................................................................. 336
21.2.9 AIUINTREG...................................................................................................................... 337
21.2.10 AIUCOUNT0REG........................................................................................................... 339
21.2.11 AIUCOUNT1REG........................................................................................................... 340
21.2.12 AIUREPNUMREG.......................................................................................................... 342
21.2.13 AIUBUSENREG............................................................................................................. 343
21.3 REGISTER SETTING FLOW............................................................................... 344
21.3.1 DMA transfer in the PWM mode....................................................................................... 344
21.3.2 In the Buzz Mode <or the Case Where DMA Is Not Used in the PWM Mode> ............... 346
CHAPTER 22 KIU (KEYBOARD INTERFACE UNIT)......................................... 349
22.1 GENERAL........................................................................................................... 349
22.1.1 Outlined Operation of the KIU.......................................................................................... 350
22.2 KIU REGISTER SET ........................................................................................... 351
22.2.1 KIUDATREG .................................................................................................................... 352
22.2.2 KIUASCANREG............................................................................................................... 353
22.2.3 KIUASTOPREG ............................................................................................................... 354
22.2.4 KIUSCANREG.................................................................................................................. 355
22.2.5 KIUSTOPREG.................................................................................................................. 356
22.2.6 KIUSAPREG .................................................................................................................... 357
22.2.7 KIUSCANSREG............................................................................................................... 358
22.2.8 KIUWKSREG ................................................................................................................... 359
22.4.9 KIUWKIREG..................................................................................................................... 360
22.2.10 KIUSRNREG.................................................................................................................. 362
22.2.11 KIUINTREG.................................................................................................................... 363