Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 92)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 5-19

SCON0.6 (SM1)

SCON0.7 (SM0/FE)

Serial Port 0 Mode Bits 1:0 (when FEDE is 0). When FEDE is set to 1, this bit is the

Framing Error Flag that is set upon detection of an invalid stop bit. It must be cleared by

software. Modification of this bit when FEDE is set has no effect on the serial mode.

MODE SM2 SM1 SM0 FUNCTION

LENGTH

(BITS)

PERIOD

0 0 0 0 Synchronous 8 12 system clocks

0 1 0 0 Synchronous 8 4 system clocks

1 x 1 0 Asynchronous 10

64/16 baud clocks

(SMOD = 0/1)

2 0 0 1 Asynchronous 11

64/32 system

clocks (SMOD =

0/1)

2 1 0 1 Asynchronous (MP) 11

64/32 system

clocks (SMOD =

0/1)

3 0 1 1 Asynchronous 11

64/16 baud clocks

(SMOD = 0/1)

3 1 1 1 Asynchronous (MP) 11

64/16 baud clocks

(SMOD = 0/1)

SBUF0 (01h, 03h) Serial Data Buffer 0

Initialization: This buffer is cleared to 00h on all forms of reset.

Read/Write Access: Unrestricted read/write.

SBUF0.7 to SBUF0.0 Serial Data Buffer 0 Bits 7:0. Data for serial port 0 is read from or written to this location.

The serial transmit and receive buffers are separate but both are addressed at this location.

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Maxim-integrated MAXQ622 Manual do Utilizador Página 92