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Diffstat (limited to 'docs/library')
| -rw-r--r-- | docs/library/pyb.UART.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/library/pyb.UART.rst b/docs/library/pyb.UART.rst index 257a9f281..509ca4080 100644 --- a/docs/library/pyb.UART.rst +++ b/docs/library/pyb.UART.rst @@ -75,6 +75,13 @@ Methods - ``timeout_char`` is the timeout in milliseconds to wait between characters. - ``read_buf_len`` is the character length of the read buffer (0 to disable). + This method will raise an exception if the baudrate could not be set within + 5% of the desired value. The minimum baudrate is dictated by the frequency + of the bus that the UART is on; UART(1) and UART(6) are APB2, the rest are on + APB1. The default bus frequencies give a minimum baudrate of 1300 for + UART(1) and UART(6) and 650 for the others. Use :func:`pyb.freq <pyb.freq>` + to reduce the bus frequencies to get lower baudrates. + *Note:* with parity=None, only 8 and 9 bits are supported. With parity enabled, only 7 and 8 bits are supported. |