
vi
12.3.3 Pin Functions......................................................................................................... 323
12.4
Usage Notes........................................................................................................................ 330
Section 13 Oscillator Circuits (HD404344R/HD404394/HD404318
/HD404358/ HD404358R Series) .............................................................. 335
13.1
Overview ............................................................................................................................ 335
13.1.1 Features ................................................................................................................. 335
13.1.2 Block Diagram ...................................................................................................... 336
13.1.3 Oscillator Circuit Pins ........................................................................................... 337
13.2
Oscillator Connection and External Clock Input................................................................ 338
13.3
Usage Notes........................................................................................................................ 340
Section 14 Oscillator Circuits (HD404339 and HD404369 Series) ...................... 343
14.1
Overview ............................................................................................................................ 343
14.1.1 Features ................................................................................................................. 343
14.1.2 Block Diagram ...................................................................................................... 344
14.1.3 Oscillator Circuit Pins ........................................................................................... 346
14.1.4 Register and Flag Configuration ........................................................................... 346
14.2
Register and Flag Descriptions .......................................................................................... 347
14.2.1 System Clock Selection Register 1 (SSR1: $027) ................................................ 347
14.2.2 System Clock Selection Register 2 (SSR2: $028) ................................................ 349
14.2.3 Low Speed On Flag (LSON: $020, 0) .................................................................. 350
14.3
Oscillator Connection and External Clock Input................................................................ 351
14.4
Usage Notes........................................................................................................................ 353
Section 15 A/D Converter .................................................................................................. 355
15.1
Overview ............................................................................................................................ 355
15.1.1 Features ................................................................................................................. 355
15.1.2 Block Diagram ...................................................................................................... 356
15.1.3 Pin Configuration .................................................................................................. 359
15.1.4 Register and Flag Configuration ........................................................................... 362
15.2
Register and Flag Descriptions .......................................................................................... 363
15.2.1 A/D Mode Register 1 (AMR1: $019) ................................................................... 363
15.2.2 A/D Mode Register 2 (AMR2: $01A) .................................................................. 365
15.2.3 A/D Data Register L, U (ADRL: $017, ADRU: $018)......................................... 367
15.2.4 A/D Channel Register (ACR: $016) ..................................................................... 368
15.2.5 A/D Start Flag (ADSF: $020, 2) ........................................................................... 371
15.2.6 IAD Off Flag (IAOF: $021, 2).............................................................................. 371
15.3
A/D Converter Operation ................................................................................................... 372
15.3.1 A/D Conversion Operation.................................................................................... 372
15.3.2 Low Power Mode Operation ................................................................................. 373
15.3.3 A/D Converter Precision ....................................................................................... 374
15.3.4 Notes on the Analog Reference Power Supply ..................................................... 375