Maxim-integrated MAXQ7667 Manual do Utilizador descarregar pdf (Página 154)

8.4.12 LIN Error Handling

hen the MAXQ7667 is used as a LIN master or slave, the application software should monitor the status of all LIN communication

with the ISVEC and ERRR registers. In the previous master and slave sections, no provision was provided to check for errors. When

the LIN controller communicates on the LIN bus, the ISVEC register should be monitored for error conditions and action should be

taken to handle the error. Also the ERRR register should be monitored after communication to detect any error conditions that occurred

s a result of transmitting or receiving data.

8.5 MAXQ7667 UART

The MAXQ7667 has a UART for serial communication. The UART can be used for standard RS-232 and RS-485 communication by

adding an external transceiver. Figure 8-6 shows the UART hardware.

8.5.1 MAXQ7667 UART Features

The MAXQ7667 UART provides the following features:

• Synchronous and asynchronous transfers

• Independent baud-rate generator

• Two-wire interface

• Full-duplex operation for asynchronous data transfers

• Half-duplex operation for synchronous data transfers

• Programmable interrupts for transmit and receive

• Programmable 9th bit parity support

• Start/stop bit support

• Transmit and receive FIFOs

__________________________________________________________________________________________________________ 8-24

MAXQ7667 User’s Guide

Figure 8-6. UART Block Diagram

MAXQ

CORE

INTERRUPTS

SBUF

TRANSMIT REGISTER

Tx FIFO

RECEIVE

BAUD-RATE

GENERATOR

Tx PIN

Rx PIN

Rx FIFO

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Maxim-integrated MAXQ7667 Manual do Utilizador Página 154