MC908MR16CFUE Datasheet, PDF (160/282 Pages) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

Serial Communications Interface Module (SCI)
Addr.
$0038
$0039
$003A
$003B
$003C
$003D
$003E
Register Name
SCI Control Register 1
(SCC1)
See page 169.
SCI Control Register 2
(SCC2)
See page 171.
SCI Control Register 3
(SCC3)
See page 173.
SCI Status Register 1
(SCS1)
See page 174.
SCI Status Register 2
(SCS2)
See page 176.
SCI Data Register
(SCDR)
See page 177.
SCI Baud Rate Register
(SCBR)
See page 177.
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
Bit 7
LOOPS
0
SCTIE
0
R8
R
U
SCTE
R
1
0
R
0
R7
T7
0
R
0
R
6
ENSCI
0
TCIE
0
T8
U
TC
R
1
0
R
0
R6
T6
5
TXINV
0
SCRIE
0
0
R
0
SCRF
R
0
0
R
0
R5
T5
0
SCP1
R
0
0
= Reserved
4
3
2
M
WAKE ILTY
0
0
0
ILIE
TE
RE
0
0
0
0
ORIE NEIE
R
0
0
0
IDLE
OR
NF
R
R
R
0
0
0
0
0
0
R
R
R
0
0
0
R4
R3
R2
T4
T3
T2
Unaffected by reset
0
SCP0
SCR2
R
0
0
0
U = Unaffected
Figure 13-3. SCI I/O Register Summary
1
PEN
0
RWU
0
FEIE
0
FE
R
0
BKF
R
0
R1
T1
SCR1
0
Bit 0
PTY
0
SBK
0
PEIE
0
PE
R
0
RPF
R
0
R0
T0
SCR0
0
13.3.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in Figure 13-4.
8-BIT DATA FORMAT
BIT M IN SCC1 CLEAR
POSSIBLE
PARITY
BIT
NEXT
START
START
BIT
BIT 0 BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 STOP BIT
BIT
START
BIT BIT 0
BIT 1
BIT 2
9-BIT DATA FORMAT
BIT M IN SCC1 SET
BIT 3 BIT 4 BIT 5 BIT 6
POSSIBLE
PARITY
BIT
BIT 7 BIT 8 STOP
BIT
NEXT
START
BIT
Figure 13-4. SCI Data Formats
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
160
Freescale Semiconductor