mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 232

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
Technical Data
230
NOTE:
RWU — Receiver Wakeup Bit
SBK — Send Break Bit
Do not toggle the SBK bit immediately after setting the SCTE bit because
toggling SBK too early causes the SCI to send a break character instead
of a preamble.
This read/write bit puts the receiver in a standby state during which
receiver interrupts are disabled. The WAKE bit in SCC1 determines
whether an idle input or an address mark brings the receiver out of the
standby state and clears the RWU bit. Reset clears the RWU bit.
Setting and then clearing this read/write bit transmits a break
character followed by a logic 1. The logic 1 after the break character
guarantees recognition of a valid start bit. If SBK remains set, the
transmitter continuously transmits break characters with no logic 1s
between them. Reset clears the SBK bit.
1 = Standby state
0 = Normal operation
1 = Transmit break characters
0 = No break characters transmitted
Serial Communications Interface (SCI)
Freescale Semiconductor
MC68HC08QA24