MC68HC908AP64_07 FREESCALE [Freescale Semiconductor, Inc], MC68HC908AP64_07 Datasheet - Page 158

• Manufacturer Part Number: MC68HC908AP64_07
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Serial Communications Interface Module (SCI)
11.4.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in
11.4.2 Transmitter
Figure 11-4
The baud rate clock source for the SCI can be selected via the configuration bit, SCIBDSRC. Source
selection values are shown in
158
BUS CLOCK
CGMXCLK
SL = 0 => X = A
SL = 1 => X = B
SCIBDSRC
CONFIG2
A
B
FROM
shows the structure of the SCI transmitter.
SL
X
START
START
BIT
BIT
BIT 0
BIT 0
SCP1
SCP0
SCR1
SCR2
SCR0
÷ 4
BIT 1
BIT 1
Figure
SCALER
BIT 2
BIT 2
PRE-
MC68HC908AP Family Data Sheet, Rev. 4
Figure 11-3. SCI Data Formats
Figure 11-4. SCI Transmitter
11-4.
BIT 3
BIT 3
DIVIDER
BAUD
PEN
PTY
BIT M IN SCC1 CLEAR
8-BIT DATA FORMAT
9-BIT DATA FORMAT
BIT M IN SCC1 SET
TXINV
BIT 4
BIT 4
÷ 16
GENERATION
BIT 5
BIT 5
PARITY
DMATE
DMATE
SCTIE
SCTE
DMATE
SCTE
SCTIE
TC
TCIE
T8
M
BIT 6
BIT 6
H
8
PARITY
BIT 7
BIT 7
BIT
SCTIE
7
SCTE
TCIE
TC
SCI DATA REGISTER
6
SHIFT REGISTER
INTERNAL BUS
PARITY
STOP
BIT 8
BIT
BIT
TRANSMIT
5
11-BIT
CONTROL LOGIC
4
TRANSMITTER
START
STOP
NEXT
3
BIT
BIT
2
START
NEXT
1
BIT
LOOPS
ENSCI
Freescale Semiconductor
SBK
Figure
TE
0
L
11-3.
TxD