7906 datasheet(12/531 Pages) RENESAS

12 / 531 page

7906 Group User’s Manual Rev.2.0

Table of contents

11.3.4 Transmit operation ................................................................................................... 11-26

11.3.5 Method of reception ................................................................................................. 11-28

11.3.6 Receive operation .................................................................................................... 11-31

11.3.7 Processing on detecting overrun error .................................................................. 11-34

[Precautions for clock synchronous serial I/O mode] .................................................... 11-35

11.4 Clock asynchronous serial I/O (UART) mode ........................................................... 11-36

11.4.1 Transfer rate (Frequency of transfer clock) ......................................................... 11-37

11.4.2 Transfer data format ................................................................................................ 11-39

11.4.3 Method of transmission ........................................................................................... 11-40

11.4.4 Transmit operation ................................................................................................... 11-44

11.4.5 Method of reception ................................................................................................. 11-47

11.4.6 Receive operation .................................................................................................... 11-50

11.4.7 Processing on detecting error ................................................................................ 11-52

11.4.8 Sleep mode ............................................................................................................... 11-53

[Precautions for clock asynchronous serial I/O (UART) mode] .................................... 11-54

CHAPTER 12. A-D CONVERTER

12.1 Overview .............................................................................................................................. 12-2

12.2 Block description .............................................................................................................. 12-4

12.2.1 A-D control registers 0, 1 ......................................................................................... 12-5

12.2.2 A-D register i (i = 0 to 4) ......................................................................................... 12-8

12.2.3 Comparator function select register 0, comparator result register 0 .................. 12-9

12.2.4 A-D conversion interrupt control register .............................................................. 12-10

12.2.5 Port P7 direction register ........................................................................................ 12-11

12.3 A-D conversion method ................................................................................................. 12-12

12.4 Absolute accuracy and Differential non-linearity error .......................................... 12-15

12.4.1 Absolute accuracy .................................................................................................... 12-15

12.4.2 Differential non-linearity error ................................................................................. 12-16

12.5 Comparison voltage in 8-bit resolution mode .......................................................... 12-17

12.6 Comparator function ....................................................................................................... 12-18

12.7 One-shot mode ................................................................................................................. 12-19

12.7.1 Settings for one-shot mode .................................................................................... 12-19

12.7.2 One-shot mode operation ....................................................................................... 12-21

12.8 Repeat mode ..................................................................................................................... 12-22

12.8.1 Settings for repeat mode ........................................................................................ 12-22

12.8.2 Repeat mode operation ........................................................................................... 12-24

12.9 Single sweep mode ......................................................................................................... 12-25

12.9.1 Settings for single sweep mode ............................................................................ 12-25

12.9.2 Single sweep mode operation ................................................................................ 12-27

12.10 Repeat sweep mode 0 .................................................................................................. 12-28

12.10.1 Settings for repeat sweep mode 0 ...................................................................... 12-28

12.10.2 Repeat sweep mode 0 operation ........................................................................ 12-30

[Precautions for A-D converter] ............................................................................................ 12-31

CHAPTER 13. D-A CONVERTER

13.1 Overview .............................................................................................................................. 13-2

13.2 Block description .............................................................................................................. 13-2

13.2.1 D-A control register ................................................................................................... 13-3

13.2.2 D-A Register i (i = 0, 1) ........................................................................................... 13-3

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