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46.3.1.12.3 Diagram
Bits
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
W
w1c
w1c
Reset
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
46.3.1.12.4 Fields
Field
Function
31-24
—
Reserved
23
TXEMPT
Transmit Buffer/FIFO Empty
Asserts when there is no data in the Transmit FIFO/buffer. This field does not take into account data that
is in the transmit shift register.
0 - Transmit buffer is not empty.
1 - Transmit buffer is empty.
22
RXEMPT
Receive Buffer/FIFO Empty
Asserts when there is no data in the receive FIFO/Buffer. This field does not take into account data that is
in the receive shift register.
0 - Receive buffer is not empty.
1 - Receive buffer is empty.
21-18
—
Reserved
17
TXOF
Transmitter Buffer Overflow Flag
Indicates that more data has been written to the transmit buffer than it can hold. This field will assert
regardless of the value of TXOFE. However, an interrupt will be issued to the host only if TXOFE is set.
This flag is cleared by writing a 1.
0 - No transmit buffer overflow has occurred since the last time the flag was cleared.
1 - At least one transmit buffer overflow has occurred since the last time the flag was cleared.
16
RXUF
Receiver Buffer Underflow Flag
Indicates that more data has been read from the receive buffer than was present. This field will assert
regardless of the value of RXUFE. However, an interrupt will be issued to the host only if RXUFE is set.
This flag is cleared by writing a 1.
0 - No receive buffer underflow has occurred since the last time the flag was cleared.
1 - At least one receive buffer underflow has occurred since the last time the flag was cleared.
15
Transmit FIFO/Buffer Flush
Table continues on the next page...
Register definition
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
1202
NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
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