Datasheet

Serial Communications Interface (SCI)
Technical Data MC68HC908GR8 — Rev 4.0
258 Serial Communications Interface (SCI) MOTOROLA
18.9.3 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
R8 — Received Bit 8
When the SCI is receiving 9-bit characters, R8 is the read-only ninth
bit (bit 8) of the received character. R8 is received at the same time
that the SCDR receives the other 8 bits.
When the SCI is receiving 8-bit characters, R8 is a copy of the eighth
bit (bit 7). Reset has no effect on the R8 bit.
T8 — Transmitted Bit 8
When the SCI is transmitting 9-bit characters, T8 is the read/write
ninth bit (bit 8) of the transmitted character. T8 is loaded into the
transmit shift register at the same time that the SCDR is loaded into
the transmit shift register. Reset has no effect on the T8 bit.
Address: $0015
Bit 7654321Bit 0
Read: R8
T8 DMARE DMATE ORIE NEIE FEIE PEIE
Write:
Reset:UU000000
= Unimplemented U = Unaffected
Figure 18-11. SCI Control Register 3 (SCC3)
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cale Semiconductor,
I
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