MC68HC708MP16 Datasheet, PDF (301/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Communications Interface Module (SCI)
14.8.1 SCI Control Register 1
SCI control register 1:
• Enables loop mode operation
• Enables the SCI
• Controls output polarity
• Controls character length
• Controls SCI wake-up method
• Controls idle character detection
• Enables parity function
• Controls parity type
Address: $0038
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 14-7. SCI Control Register 1 (SCC1)
LOOPS — Loop Mode Select Bit
This read/write bit enables loop mode operation. In loop mode the
PTE6/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
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor
Serial Communications Interface Module (SCI)
Technical Data
301