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NOTE:
15.9.3 SCI Control Register 3
MC68HC908AB32
Rev. 1.0
—
MOTOROLA
SBK — Send Break Bit
Setting and then clearing this read/write bit transmits a break
character followed by a logic 1. The logic 1 after the break character
guarantees recognition of a valid start bit. If SBK remains set, the
transmitter continuously transmits break characters with no logic 1s
between them. Reset clears the SBK bit.
1 = Transmit break characters
0 = No break characters being transmitted
Do not toggle the SBK bit immediately after setting the SCTE bit.
Toggling SBK before the preamble begins causes the SCI to send a
break character instead of a preamble.
SCI control register 3:
•
Stores the ninth SCI data bit received and the ninth SCI data bit to
be transmitted
•
Enables these interrupts:
– Receiver overrun interrupts
– Noise error interrupts
– Framing error interrupts
•
Parity error interrupts
Address:
$0015
Bit 7
6
Read:
R8
T8
Write:
Reset:
U
U
= Unimplemented
Figure 15-11. SCI Control Register 3 (SCC3)
Serial Communications Interface Module (SCI)
Serial Communications Interface Module (SCI)
5
4
3
R
R
ORIE
0
0
0
R = Reserved
I/O Registers
2
1
Bit 0
NEIE
FEIE
PEIE
0
0
U = Unaffected
Technical Data
0
267
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