MC68HC08XL36 Datasheet, PDF (253/362 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

SCI Control
Register 1
Freescale Semiconductor, Inc.
Serial Communications Interface Module (SCI)
I/O Registers
SCI control register 1:
• Enables loop mode operation.
• Enables the SCI.
• Controls output polarity.
• Controls character length.
• Controls SCI wakeup method.
• Controls idle character detection.
• Enables parity function.
• Controls parity type.
Address: $0013
Bit 7
6
5
4
3
2
1
Bit 0
Read:
LOOPS ENSCI TXINV
M
WAKE ILLTY PEN
PTY
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 11. SCI Control Register 1 (SCC1)
LOOPS — Loop Mode Select Bit
This read/write bit enables loop mode operation. In loop mode the
RxD pin is disconnected from the SCI, and the transmitter output goes
into the receiver input. Both the transmitter and the receiver must be
enabled to use loop mode. Reset clears the LOOPS bit.
1 = Loop mode enabled
0 = Normal operation enabled
27-sci_d
MOTOROLA
Serial Communications Interface Module (SCI)
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MC68HC08XL36
253