UART TX
From SpecNext official Wiki
| Number | $133B |
|---|---|
| Decimal | 4923 |
| Short desc. | Sends byte to serial port. If read, tells if data in RX buffer |
| Bit Mask | %0001 0011 0011 1011 |
| Readable | Yes |
| Writable | Yes |
| Subsystem | UART |
Write to this port sends the byte to serial port (routed to WiFi module connector). Read from this port returns 0 if there are bytes to read in RX FIFO buffer, or 1 if no RX data.