Table 27-12 Uart1 Receiver Register N - Motorola DragonBall MC9328MX1 Reference Manual

Table 27-12. UART1 Receiver Register n and UART2 Receiver Register n Description (Continued)
Name
OVRRUN Receiver Overrun—Indicates whether the receiver
Bit 13 ignored data to prevent overwriting the data in the
RxFIFO. This error indicates that the software is not
keeping up with the incoming data rate. OVRRUN is set
for the last (32nd) character written to the RxFIFO to
indicate that all characters following this character will be
ignored if a read is not performed by the software.
OVRRUN is updated and valid for each received
character. Under normal circumstances, OVRRUN is
never set.
FRMERR Frame Error—Indicates whether the current character
Bit 12 had a framing error (a missing stop bit) and is possibly
corrupted. FRMERR is updated for each character read
from the RxFIFO.
BRK BREAK Detect—Indicates whether the current character
Bit 11 was detected as a BREAK character. The data bits and
the stop bit are all 0. The FRMERR bit is set when BRK is
set. When odd parity is selected, PRERR is also set when
BRK is set. BRK is valid for each character read from the
RxFIFO.
PRERR Parity Error—Indicates whether the current character was
Bit 10 detected with a parity error and is possibly corrupted.
PRERR is updated for each character read from the
RxFIFO. When parity is disabled, PRERR always reads as
0.
Reserved Reserved—These bits are reserved and should read 0.
Bits 9–8
RX_DATA Received Data—Holds the received character. In 7-bit mode, the most significant bit (MSB) is
Bits 7–0 forced to 0. In 8-bit mode, all bits are active.
MOTOROLA Universal Asynchronous Receiver/Transmitters (UART) Modules
Description
Programming Model
Settings
0 = No RxFIFO overrun was
detected
1 = A RxFIFO overrun was
detected
0 = The current character has no
framing error
1 = The current character has a
framing error
0 = The current character is not a
BREAK character
1 = The current character is a
BREAK character
0 = No parity error was detected for
data in the RX_DATA field
1 = A parity error was detected for
data in the RX_DATA field
27-23