mc68hc908qz16 Freescale Semiconductor, Inc, mc68hc908qz16 Datasheet - Page 186

• Manufacturer Part Number: mc68hc908qz16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Enhanced Serial Communications Interface (ESCI) Module
15.4.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in
15.4.2 Transmitter
Figure 15-5
The baud rate clock source for the ESCI can be selected via the configuration bit, ESCIBDSRC.
186
PSSB4
PSSB3
PSSB2
PSSB1
PSSB0
PDS2
PDS1
PDS0
shows the structure of the SCI transmitter and the registers are summarized in
SCP1
SCP0
SCR1
SCR2
SCR0
÷
4
START
START
BIT
BIT
SCALER
PRE-
BIT 0
BIT 0
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
BIT 1
BIT 1
DIVIDER
BAUD
PEN
PTY
TXINV
BIT 2
BIT 2
Figure 15-4. SCI Data Formats
Figure 15-5. ESCI Transmitter
÷
GENERATION
BIT 3
BIT 3
16
PARITY
(BIT M IN SCC1 CLEAR)
SCTE
SCTIE
TC
TCIE
9-BIT DATA FORMAT
(BIT M IN SCC1 SET)
8-BIT DATA FORMAT
T8
M
BIT 4
BIT 4
H
BIT 5
BIT 5
8
SCTIE
7
SCTE
TCIE
TC
BIT 6
BIT 6
ESCI DATA REGISTER
6
SHIFT REGISTER
INTERNAL BUS
TRANSMIT
5
OR DATA
PARITY
11-BIT
BIT 7
BIT 7
BIT
4
CONTROL LOGIC
TRANSMITTER
3
OR DATA
PARITY
STOP
BIT 8
BIT
BIT
2
1
START
LOOPS
NEXT
STOP
ENSCI
BIT
BIT
LINT
SBK
TE
0
L
START
NEXT
BIT
Freescale Semiconductor
Figure
15-4.
Figure
SCI_TxD
15-3.