MC68HC908GR8 Datasheet, PDF (164/286 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Serial Communications Interface (SCI)
Addr.
$0013
$0014
$0015
$0016
$0017
$0018
$0019
Register Name
Bit 7
6
5
4
3
Read:
SCI Control Register 1
(SCC1)
Write:
LOOPS
ENSCI
TXINV
M
WAKE
Reset: 0
0
0
0
0
Read:
SCI Control Register 2
(SCC2)
Write:
SCTIE
TCIE
SCRIE
ILIE
TE
Reset: 0
0
0
0
0
Read: R8
SCI Control Register 3
(SCC3)
Write:
T8
R
Reset: U
U
0
R
ORIE
0
0
Read: SCTE
TC
SCRF
IDLE
OR
SCI Status Register 1
(SCS1)
Write:
Reset: 1
1
0
0
0
Read: 0
0
0
0
0
SCI Status Register 2
(SCS2)
Write:
Reset: 0
0
0
0
0
Read: R7
R6
R5
R4
R3
SCI Data Register
(SCDR)
Write:
T7
T6
T5
T4
T3
Reset:
Unaffected by reset
Read: 0
SCI Baud Rate Register
(SCBR)
Write:
Reset: 0
0
SCP1
SCP0
R
0
0
0
0
= Unimplemented
R = Reserved
Figure 18-2. SCI I/O Register Summary
2
1
ILTY
PEN
0
0
RE
RWU
0
0
NEIE
FEIE
0
0
NF
FE
0
0
0
BKF
0
0
R2
R1
T2
T1
SCR2
SCR1
0
0
U = Unaffected
Bit 0
PTY
0
SBK
0
PEIE
0
PE
0
RPF
0
R0
T0
SCR0
0
18.4.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in Figure 18-3.
8-BIT DATA FORMAT
BIT M IN SCC1 CLEAR
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
9-BIT DATA FORMAT
BIT M IN SCC1 SET
PARITY
BIT
NEXT
START
BIT BIT 0 BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 STOP BIT
BIT
Figure 18-3. SCI Data Formats
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
164
Freescale Semiconductor