Lines Matching +full:fifo +full:- +full:width

51 .Bl -tag -compact -width 0x000000
57 set RX FIFO trigger level to ``low'' (NS8250 only)
59 set RX FIFO trigger level to ``medium low'' (NS8250 only)
61 set RX FIFO trigger level to ``medium high'' (default, NS8250 only)
63 set RX FIFO trigger level to ``high'' (NS8250 only)
70 EIA RS-232C (CCITT V.24) serial communications interface.
110 It contains the bus attachments and the low-level interrupt handler.
142 .Bl -bullet -compact
180 .Bl -tag -compact -offset "mmmm" -width "mmmm"
191 .Bl -tag -compact -offset "mmmm" -width "mmmm"
193 Invert the pulse (RS-232 logic low = ASSERT, high = CLEAR).
198 Add the narrow pulse option when the incoming PPS pulse width is small
214 RFC 2783 defines an ASSERT event as a higher-voltage line level, and a CLEAR
215 event as a lower-voltage line level, in the context of the RS-232 protocol.
216 The modem control signals on a TTL-level connection are typically
217 inverted from the RS-232 levels.
218 For example, carrier presence is indicated by a high signal on an RS-232
221 TTL and RS-232 line levels in most hardware designs.
222 Generally speaking, a connection to a DB-9 style connector is an RS-232
224 A connection to header pins or an edge-connector on an embedded board
229 driver also supports an initial-state and a lock-state control
232 from those of the corresponding initial-state device
236 in the normal way on the initial-state devices to program
243 on the lock-state device.
245 may be locked by setting the corresponding value in the lock-state
249 on the initial-state device and
251 on the lock-state device.
276 .Bl -tag -width indent
281 .Bl -tag -width indent
284 Enable the so-called
287 For NS 16550-compatible devices, this will use heuristics to ensure that the
289 DesignWare-based UARTs need this due to a design flaw in the UART.
302 driver to not program the baud rate divisor and use the hardware as-is.
313 .Bl -tag -width indent
326 Specifies the physical address of a memory-mapped UART.
341 Register width.
356 .Bl -tag -width "/dev/ttyu?.init" -compact
361 corresponding callin initial-state and lock-state devices
367 corresponding callout initial-state and lock-state devices