MC68HC08XL36 Datasheet, PDF (259/362 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Serial Communications Interface Module (SCI)
I/O Registers
SBK — Send Break 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 = Transmit break characters
0 = No break characters being transmitted
NOTE:
Do not toggle the SBK bit immediately after setting the SCTE bit.
Toggling SBK before the preamble begins causes the SCI to send a
break character instead of a preamble.
SCI Control
Register 3
SCI control register 3:
• Stores the ninth SCI data bit received and the ninth SCI data bit to
be transmitted.
• Enables SCI receiver full (SCRF) DMA service requests.
• Enables SCI transmitter empty (SCTE) DMA service requests.
• Enables the following interrupts:
– Receiver overrun interrupts
– Noise error interrupts
– Framing error interrupts
– Parity error interrupts
Address: $0015
Bit 7
6
5
4
3
2
1
Bit 0
Read: R8
Write:
T8 DMARE DMATE ORIE NEIE FEIE PEIE
Reset: U
U
0
0
0
0
0
0
= Unimplemented U = Unaffected
Figure 13. SCI Control Register 3 (SCC3)
33-sci_d
MOTOROLA
Serial Communications Interface Module (SCI)
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MC68HC08XL36
259