Rev. 2.0, 03/02, page xii of xxii
13.8.3 Receive Error Flags and Transmit Operations
(Clocked Synchronous Mode Only)..................................................................192
13.8.4 Receive Data Sampling Timing and Reception Margin in
Asynchronous Mode........................................................................................193
Section 14 A/D Converter.............................................................................. 195
14.1
Features.......................................................................................................................195
14.2
Input/Output Pins.........................................................................................................197
14.3
Register Description.....................................................................................................198
14.3.1 A/D Data Registers A to D (ADDRA to ADDRD)...........................................198
14.3.2 A/D Control/Status Register (ADCSR) ............................................................199
14.3.3 A/D Control Register (ADCR).........................................................................200
14.4
Operation.....................................................................................................................201
14.4.1 Single Mode....................................................................................................201
14.4.2 Scan Mode......................................................................................................201
14.4.3 Input Sampling and A/D Conversion Time.......................................................202
14.4.4 External Trigger Input Timing.........................................................................203
14.5
A/D Conversion Accuracy Definitions .........................................................................204
14.6
Usage Notes.................................................................................................................205
14.6.1 Permissible Signal Source Impedance..............................................................205
14.6.2 Influences on Absolute Accuracy.....................................................................205
Section 15 Power Supply Circuit ................................................................... 207
15.1
When Using Internal Power Supply Step-Down Circuit................................................207
15.2
When Not Using Internal Power Supply Step-Down Circuit .........................................208
Section 16 List of Registers........................................................................... 209
16.1
Register Addresses (Address Order).............................................................................210
16.2
Register Bits................................................................................................................213
16.3
Register States in Each Operating Mode.......................................................................216
Section 17 Electrical Characteristics.............................................................. 219
17.1
Absolute Maximum Ratings.........................................................................................219
17.2
Electrical Characteristics..............................................................................................219
17.2.1 Power Supply Voltage and Operating Ranges ..................................................219
17.2.2 DC Characteristics...........................................................................................221
17.2.3 AC Characteristics...........................................................................................226
17.2.4 A/D Converter Characteristics.........................................................................229
17.2.5 Watchdog Timer..............................................................................................230
17.2.6 Flash Memory Characteristics (Preliminary) ....................................................231
17.3
Operation Timing.........................................................................................................233
17.4
Output Load Condition ................................................................................................235