Datasheet

UART Modules
12-18 MCF5206e USER’S MANUAL MOTOROLA
You can use this feature for flow control to prevent overrun in the receiver by using the
RTS output to control the CTS input of the transmitting device. If both the receiver and
transmitter are programmed for RTS control, RTS control is disabled for both because
such a configuration is incorrect. See Section 12.4.1.2 Mode Register 2 (UMR2) for
information on programming the transmitter RTS control. On UART 2, RTS is muxed.
RxIRQ — Receiver Interrupt Select
1 = FFULL is the source that generates IRQ
0 = RxRDY is the source that generates IRQ
ERR — Error Mode
This bit controls the meaning of the three FIFO status bits (RB, FE, and PE) in the USR.
1 = Block mode—The values in the channel USR are the accumulation (i.e., the
logical OR) of the status for all characters coming to the top of the FIFO since
the last reset error status command for the channel was issued. Refer to Section
12.4.1.5 Command Register (UCR) for more information on UART module
commands.
0 = Character mode—The values in the channel USR reflect the status of the
character at the top of the FIFO.
NOTE
You must use ERR = 0 to obtain the correct A/D flag
information when in multidrop mode.
PM1–PM0 — Parity Mode
These bits encode the type of parity used for the channel (see Table 12-2). The parity bit
is added to the transmitted character and the receiver performs a parity check on
incoming data. These bits can alternatively select multidrop mode for the channel.
PT — Parity Type
This bit selects the parity type if parity is programmed by the parity mode bits; if multidrop
mode is selected, it configures the transmitter for data character transmission or address
character transmission. Table 12-2 lists the parity mode and type or the multidrop mode
for each combination of the parity mode and the parity type bits.
Table 12-2. PMx and PT Control Bits
PM1 PM0 PARITY MODE PT PARITY TYPE
0 0 With Parity 0 Even Parity
0 0 With Parity 1 Odd Parity
0 1 Force Parity 0 Low Parity
0 1 Force Parity 1 High Parity
1 0 No Parity X No Parity
1 1 Multidrop Mode 0 Data Character
1 1 Multidrop Mode 1 Address Character
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