MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 248

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Serial Communications Interface (SCI)
17.4.1 Data Format
17.4.2 Transmitter
17.4.3 Character Length
Advance Information
248
The SCI uses the standard non-return-to-zero mark/space data format
illustrated in
Figure 17-4
The transmitter can accommodate either 8-bit or 9-bit data. The state of
the M bit in SCI control register 1 (SCC1) determines character length.
When transmitting 9-bit data, bit T8 in SCI control register 3 (SCC3) is
the ninth bit (bit 8).
START
START
BIT
BIT
Serial Communications Interface (SCI)
BIT 0
BIT 0
Figure
shows the structure of the SCI transmitter.
BIT 1
BIT 1
BIT 2
BIT 2
Figure 17-3. SCI Data Formats
17-3.
BIT 3
BIT 3
(BIT M IN SCC1 CLEAR)
8-BIT DATA FORMAT
9-BIT DATA FORMAT
(BIT M IN SCC1 SET)
BIT 4
BIT 4
BIT 5
BIT 5
BIT 6
BIT 6
POSSIBLE
PARITY
BIT 7
BIT 7
MC68HC708AS48
BIT
POSSIBLE
PARITY
STOP
BIT 8
BIT
BIT
START
NEXT
STOP
BIT
BIT
MOTOROLA
START
NEXT
BIT
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Rev. 4.0