Information

UARTx_C2 field descriptions (continued)
Field Description
6
TCIE
Transmission Complete Interrupt Enable
Enables the transmission complete flag, S1[TC], to generate interrupt requests .
0 TC interrupt requests disabled.
1
TC interrupt requests enabled.
5
RIE
Receiver Full Interrupt or DMA Transfer Enable
Enables S1[RDRF] to generate interrupt requests or DMA transfer requests, based on the state of
C5[RDMAS].
0 RDRF interrupt and DMA transfer requests disabled.
1 RDRF interrupt or DMA transfer requests enabled.
4
ILIE
Idle Line Interrupt Enable
Enables the idle line flag, S1[IDLE], to generate interrupt requests , based on the state of C5[ILDMAS].
0 IDLE interrupt requests disabled.
1 IDLE interrupt requests enabled.
3
TE
Transmitter Enable
Enables the UART transmitter. TE can be used to queue an idle preamble by clearing and then setting TE.
When C7816[ISO_7816E] is set/enabled and C7816[TTYPE] = 1, this field is automatically cleared after
the requested block has been transmitted. This condition is detected when TL7816[TLEN] = 0 and four
additional characters are transmitted.
0 Transmitter off.
1 Transmitter on.
2
RE
Receiver Enable
Enables the UART receiver.
0 Receiver off.
1 Receiver on.
1
RWU
Receiver Wakeup Control
This field can be set to place the UART receiver in a standby state. RWU automatically clears when an
RWU event occurs, that is, an IDLE event when C1[WAKE] is clear or an address match when C1[WAKE]
is set. This field must be cleared when C7816[ISO_7816E] is set.
NOTE: RWU must be set only with C1[WAKE] = 0 (wakeup on idle) if the channel is currently not idle.
This can be determined by S2[RAF]. If the flag is set to wake up an IDLE event and the channel
is already idle, it is possible that the UART will discard data. This is because the data must be
received or a LIN break detected after an IDLE is detected before IDLE is allowed to reasserted.
0 Normal operation.
1 RWU enables the wakeup function and inhibits further receiver interrupt requests. Normally, hardware
wakes the receiver by automatically clearing RWU.
0
SBK
Send Break
Toggling SBK sends one break character from the following: See for the number of logic 0s for the
different configurations. Toggling implies clearing the SBK field before the break character has finished
Table continues on the next page...
Memory map and registers
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
1284
Preliminary
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