Datasheet

Rev.5.00 Nov. 02, 2005 Page xviii of xxxii
18.4.2 Scan Mode............................................................................................................ 343
18.4.3 Input Sampling and A/D Conversion Time .......................................................... 344
18.4.4 External Trigger Input Timing.............................................................................. 345
18.5 A/D Conversion Accuracy Definitions.............................................................................. 346
18.6 Usage Notes....................................................................................................................... 348
18.6.1 Permissible Signal Source Impedance.................................................................. 348
18.6.2 Influences on Absolute Accuracy......................................................................... 348
Section 19 EEPROM.........................................................................................349
19.1 Features.............................................................................................................................. 349
19.2 Input/Output Pins...............................................................................................................351
19.3 Register Description .......................................................................................................... 351
19.3.1 EEPROM Key Register (EKR)............................................................................. 351
19.4 Operation ........................................................................................................................... 352
19.4.1 EEPROM Interface............................................................................................... 352
19.4.2 Bus Format and Timing ........................................................................................ 352
19.4.3 Start Condition...................................................................................................... 352
19.4.4 Stop Condition...................................................................................................... 353
19.4.5 Acknowledge........................................................................................................ 353
19.4.6 Slave Addressing .................................................................................................. 353
19.4.7 Write Operations................................................................................................... 354
19.4.8 Acknowledge Polling............................................................................................ 356
19.4.9 Read Operation..................................................................................................... 356
19.5 Usage Notes....................................................................................................................... 359
19.5.1 Data Protection at V
CC
On/Off............................................................................... 359
19.5.2 Write/Erase Endurance ......................................................................................... 359
19.5.3 Noise Suppression Time....................................................................................... 359
Section 20 Power-On Reset and Low-Voltage Detection Circuits (Optional)..361
20.1 Features.............................................................................................................................. 361
20.2 Register Descriptions......................................................................................................... 362
20.2.1 Low-Voltage-Detection Control Register (LVDCR)............................................ 362
20.2.2 Low-Voltage-Detection Status Register (LVDSR)............................................... 364
20.3 Operation ........................................................................................................................... 365
20.3.1 Power-On Reset Circuit........................................................................................ 365
20.3.2 Low-Voltage Detection Circuit............................................................................. 366
Section 21 Power Supply Circuit ......................................................................371
21.1 When Using Internal Power Supply Step-Down Circuit ................................................... 371
21.2 When Not Using Internal Power Supply Step-Down Circuit............................................. 372