mc68hc11d0cfn2 Freescale Semiconductor, Inc, mc68hc11d0cfn2 Datasheet - Page 79

• Manufacturer Part Number: mc68hc11d0cfn2
• Description: M68hc11 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

6.7.3 SCI Control Register 2
MC68HC711D3 — Rev. 2
MOTOROLA
The SCI control register 2 (SCCR2) provides the control bits that enable or disable
individual SCI functions.
TIE — Transmit Interrupt Enable Bit
TCIE — Transmit Complete Interrupt Enable Bit
RIE — Receiver Interrupt Enable Bit
ILIE — Idle Line Interrupt Enable Bit
TE — Transmitter Enable Bit
RE — Receiver Enable Bit
RWU — Receiver Wakeup Control Bit
SBK — Send Break Bit
When TE goes from 0 to 1, one unit of idle character time (logic 1) is queued as
a preamble.
At least one character time of break is queued and sent each time SBK is written
to 1. More than one break may be sent if the transmitter is idle at the time the
SBK bit is toggled on and off, as the baud rate clock edge could occur between
writing the 1 and writing the 0 to SBK.
Address:
Reset:
Read:
Write:
1 = TDRE interrupts disabled
1 = SCI interrupt requested when TDRE status flag is set
0 = TC interrupts disabled
1 = SCI interrupt requested when TC status flag is set
0 = RDRF and OR interrupts disabled
1 = SCI interrupt requested when RDRF flag or the OR status flag is set
1 = IDLE interrupts disabled
1 = SCI interrupt requested when IDLE status flag is set
0 = Transmitter disabled
1 = Transmitter enabled
0 = Receiver disabled
1 = Receiver enabled
0 = Normal SCI receiver
1 = Wakeup enabled and receiver interrupts inhibited
0 = Break generator off
1 = Break codes generated as long as SBK = 1
Freescale Semiconductor, Inc.
For More Information On This Product,
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Bit 7
TIE
Serial Communications Interface (SCI)
0
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Figure 6-5. SCI Control Register 2 (SCCR2)
TCIE
6
0
RIE
5
0
ILIE
4
0
Serial Communications Interface (SCI)
TE
3
0
RE
2
0
RWU
1
0
SCI Registers
Data Sheet
Bit 0
SBK
0
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