UART TX
From SpecNext Wiki
| Number | PortNumber::$133B |
|---|---|
| Decimal | NumberDec::4923 |
| Short desc. | ShortDesc::Sends byte to serial port. If read, tells if data in RX buffer |
| Bit Mask | [[PortMask::%0001 0011 0011 1011]] |
| Readable | Readable::Yes |
| Writable | Writable::Yes |
| Subsystem | Subsystem::UART |
0x133B UART Tx
(R)
- bit 7 = 1 if the Rx is in a break condition ; external device has held Tx=0 for at least 20 bit periods
- bit 6 = 1 if the Rx experienced a framing error ; (clears on read, includes parity and stop bit errors)
- bit 5 = 1 if the next Rx byte was received after an error condition was detected (framing, overflow)
- bit 4 = 1 if the Tx buffer is empty
- bit 3 = 1 if the Rx buffer is near full (3/4)
- bit 2 = 1 if the Rx buffer overflowed ; (clears on read)
- bit 1 = 1 if the Tx buffer is full
- bit 0 = 1 if the Rx buffer contains bytes
(W)
- Send a byte to the connected device.