MC68HC08AZ0 Datasheet, PDF (202/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Serial Communications Interface Module (SCI)
LOOPS — Loop mode select bit
This read/write bit enables loop mode operation. In loop mode the
PTE1/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
TXINV — Transmit inversion bit
This read/write bit reverses the polarity of transmitted data. Reset
clears the TXINV bit.
1 = Transmitter output inverted
0 = Transmitter output not inverted
NOTE: Setting the TXINV bit inverts all transmitted values, including idle, break,
start, and stop bits.
M — Mode (character length) bit
This read/write bit determines whether SCI characters are 8 or 9 bits
long (see Table 7). The ninth bit can serve as an extra stop bit, as a
receiver wake-up signal, or as a parity bit. Reset clears the M bit.
1 = 9-bit SCI characters
0 = 8-bit SCI characters
MC68HC08AZ0
200
Serial Communications Interface Module (SCI)
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