Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 137)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 9-1

9.1 USART Modes ............................................................................9-2

9.1.1 USART Mode 0.......................................................................9-2

9.1.2 USART Mode 1.......................................................................9-4

9.1.3 USART Mode 2.......................................................................9-4

9.1.4 USART Mode 3.......................................................................9-7

9.2 Baud-Rate Generation ......................................................................9-8

9.2.1 Mode 0 Baud Rate ....................................................................9-8

9.2.2 Mode 2 Baud Rate ....................................................................9-8

9.2.3 Mode 1 or 3 Baud Rate ................................................................9-8

9.2.4 Baud-Clock Generator .................................................................9-8

9.3 Framing Error Detection.....................................................................9-9

9.4 USART Peripheral Registers .................................................................9-10

9.4.1 Serial Control Register (SCON) ..........................................................9-10

9.4.2 Serial Port Mode Register (SMD) .........................................................9-11

9.4.3 Serial Port Data Buffer Register (SBUF)....................................................9-11

9.4.4 Serial Port Phase Register (PR) ..........................................................9-11

SECTION 9: SERIAL I/O MODULE

This section contains the following information:

LIST OF FIGURES

Figure 9-1. USART Mode 0 .....................................................................9-3

Figure 9-2. USART Mode 1 .....................................................................9-5

Figure 9-3. USART Mode 2 .....................................................................9-6

Figure 9-4. USART Mode 3 .....................................................................9-7

LIST OF TABLES

Table 9-1. USART Mode Summary ...............................................................9-2

Table 9-2. USART Baud-Clock Summary ..........................................................9-8

Table 9-3. Example Baud-Clock Generator Settings (SMOD = 1) .......................................9-9

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Maxim-integrated MAXQ622 Manual do Utilizador Página 137