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Programming Model
Table 14-12. UART 2 Receiver Register Description (Continued)
Name
FRAME
Frame Error (Character Status)—This read-only bit indicates
ERROR
that the current character had a framing error (missing stop bit),
Bit 10
which indicates that there may be corrupted data. This bit is
updated for each character read from the FIFO.
BREAK
Break (Character Status)—This read-only bit indicates that
Bit 9
the current character was detected as a BREAK. The data bits
are all 0 and the stop bit is also 0. The FRAME ERROR bit will
always be set when this bit is set, and if odd parity is selected,
PARITY ERROR will also be set. This bit is updated and valid
with each character read from the FIFO.
PARITY
Parity Error (Character Status)—This read-only bit indicates
ERROR
that the current character was detected with a parity error,
Bit 8
which indicates that there may be corrupted data. This bit is
updated and valid with each character read from the FIFO.
While parity is disabled, this bit always reads 0.
RX
Rx Data (Character Data)—This read-only field is the top
DATA
receive character in the FIFO. The bits have no meaning if the
Bits 7–0
DATA READY bit is 0. In 7-bit mode, the most significant bit is
forced to 0, and in 8-bit mode, all bits are active.
14.4.11
UART 2 Transmitter Register
The UART 2 transmitter (UTX2) register controls how the transmitter operates. The bit position
assignments for this register are shown in the following register display. The settings for this register are
described in Table 14-13.
UTX2
BIT 15
14
FIFO
FIFO
EMPTY
HALF
TYPE
r
r
0
0
RESET
Table 14-13. UART 2 Transmitter Register Description
Name
FIFO
FIFO Empty (FIFO Status)—This read-only bit indicates that
EMPTY
the transmitter FIFO is empty. This bit generates a maskable
Bit 15
interrupt.
14-24
Description
UART 2 Transmitter Register
13
12
11
TX
SEND
NO
AVAIL
BREAK
CTS2
r
rw
rw
0
0
0
Description
MC68VZ328 User's Manual
0 = Character has no framing error
1 = Character has a framing error
0 = Character is not a break
character
1 = Character is a break character
See description
See description
10
9
8
7
B
U
CTS2
CTS2
S
STAT
DELTA
Y
rw
rw
rw
w
0
0
0
0
0x0000
0 = Transmitter FIFO is not empty
1 = Transmitter FIFO is empty
Setting
0x(FF)FFF916
6
5
4
3
2
1
BIT 0
TX DATA
w
w
w
w
w
w
w
0
0
0
0
0
0
0
Setting
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