Maxim Integrated MAXQ7667 - Manual (Page 154)

8.4.12 LIN Error Handling
When 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
as 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
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MAXQ7667 User’s Guide
Figure 8-6. UART Block Diagram
MAXQ
CORE
INTERRUPTS
SBUF
REGISTER
TRANSMIT REGISTER Tx FIFO
RECEIVE
REGISTER
BAUD-RATE
GENERATOR
Tx PIN
Rx PIN Rx FIFO