MC68HC908KX8 Datasheet, PDF (183/310 Pages) Motorola, Inc – Microcontrollers

Serial Communications Interface Module (SCI)
Functional Description
The source of the baud rate clock is determined by the configuration
register 2 bit, SCIBDSRC. If SCIBDSRC is set then the source of the SCI
is the internal data bus clock. If SCIBDSRC is cleared, the source of the
SCI is oscillator output CGMXCLK.
During normal operation, the CPU monitors the status of the SCI, writes
the data to be transmitted, and processes received data.
Addr.
$0013
$0014
$0015
$0016
$0017
$0018
$0019
Register Name
Bit 7
6
5
SCI Control Register 1 ^Read:
(SCC1) Write:
See page 198. _Reset:
LOOPS
0
ENSCI
0
TXINV
0
SCI Control Register 2 ^Read: _SCTIE
TCIE
SCRIE
(SCC2) Write:
See page 201. _{Reset: 0}
0
0
SCI Control Register 3 ^{Read: R8}
T8
R
(SCC3) Write:
See page 204. _{Reset: U}
U
0
SCI Status Register 1 ^{Read: SCTE}
TC
SCRF
(SCS1) Write:
See page 206. _{Reset: 1}
1
0
SCI Status Register 2 ^{Read: 0}
0
0
(SCS2) Write:
See page 210. _{Reset: 0}
0
0
SCI Data Register ^{Read: R7}
R6
R5
(SCDR) Write: T7
T6
T5
See page 211. _Reset:
SCI Baud Rate Register ^{Read: 0}
(SCBR) Write:
See page 211. _{Reset: 0}
0
SCP1
0
0
= Unimplemented
4
3
2
1
Bit 0
M
WAKE ILTY
PEN
PTY
0
0
0
0
0
ILIE
TE
RE
RWU SBK
0
0
0
0
0
R
ORIE NEIE FEIE PEIE
0
0
0
0
0
IDLE
OR
NF
FE
PE
0
0
0
0
0
0
0
0
BKF
RPF
0
0
0
0
0
R4
R3
R2
R1
R0
T4
T3
T2
T1
T0
Unaffected by reset
SCP0
R
SCR2 SCR1 SCR0
0
0
0
0
0
R = Reserved
U = Unaffected
Figure 14-2. SCI I/O Register Summary
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
Serial Communications Interface Module (SCI)
Technical Data
183