MC68HC908KX8 Datasheet, PDF (198/310 Pages) Motorola, Inc – Microcontrollers

Serial Communications Interface Module (SCI)
14.8.1 SCI Control Register 1
SCI control register 1 (SCC1):
• 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 ILTY
PEN
PTY
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 14-9. 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
ENSCI — Enable SCI Bit
This read/write bit enables the SCI and the SCI baud rate generator.
Clearing ENSCI sets the SCTE and TC bits in SCI status register 1
and disables transmitter interrupts. Reset clears the ENSCI bit.
1 = SCI enabled
0 = SCI disabled
Technical Data
198
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
Serial Communications Interface Module (SCI)
MOTOROLA