Motorola MC68HC908AB32 - SCI Control Register 3

Serial Communications Interface Module (SCI)
I/O Registers
MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA Serial Communications Interface Module (SCI) 267
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
NOTE: 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.
15.9.3 SCI Control Register 3
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 654321Bit 0
Read: R8
T8 R R ORIE NEIE FEIE PEIE
Write:
Reset: U U 000000
= Unimplemented R = Reserved U = Unaffected
Figure 15-11. SCI Control Register 3 (SCC3)