1 data format, Data format – Freescale Semiconductor MC68HC908MR32 User Manual
Page 160
Serial Communications Interface Module (SCI)
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
160
Freescale Semiconductor
13.3.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in
Figure 13-4. SCI Data Formats
Addr.
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
$0038
SCI Control Register 1
(SCC1)
Read:
LOOPS
ENSCI
TXINV
M
WAKE
ILTY
PEN
PTY
Write:
Reset:
0
0
0
0
0
0
0
0
$0039
SCI Control Register 2
(SCC2)
Read:
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
Write:
Reset:
0
0
0
0
0
0
0
0
$003A
SCI Control Register 3
(SCC3)
Read:
R8
T8
0
0
ORIE
NEIE
FEIE
PEIE
Write:
R
R
R
Reset:
U
U
0
0
0
0
0
0
$003B
SCI Status Register 1
(SCS1)
Read:
SCTE
TC
SCRF
IDLE
OR
NF
FE
PE
Write:
R
R
R
R
R
R
R
R
Reset:
1
1
0
0
0
0
0
0
$003C
SCI Status Register 2
(SCS2)
Read:
0
0
0
0
0
0
BKF
RPF
Write:
R
R
R
R
R
R
R
R
Reset:
0
0
0
0
0
0
0
0
$003D
SCI Data Register
(SCDR)
Read:
R7
R6
R5
R4
R3
R2
R1
R0
Write:
T7
T6
T5
T4
T3
T2
T1
T0
Reset:
Unaffected by reset
$003E
SCI Baud Rate Register
(SCBR)
Read:
0
0
SCP1
SCP0
0
SCR2
SCR1
SCR0
Write:
R
R
R
Reset:
0
0
0
0
0
0
0
0
R
= Reserved
U = Unaffected
Figure 13-3. SCI I/O Register Summary
BIT 5
START
BIT
BIT 0
BIT 1
NEXT
STOP
BIT
START
BIT
8-BIT DATA FORMAT
BIT M IN SCC1 CLEAR
START
BIT
BIT 0
NEXT
STOP
BIT
START
BIT
9-BIT DATA FORMAT
BIT M IN SCC1 SET
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 2
BIT 3
BIT 4
BIT 6
BIT 7
POSSIBLE
PARITY
BIT
POSSIBLE
PARITY
BIT