MC68HC08AS32 Datasheet, PDF (157/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Addr.
$0013
$0014
$0015
$0016
$0017
$0018
$0019
Register Name
SCI Control Register 1 ^Read:
(SCC1) Write:
See page 170. _Reset:
SCI Control Register 2 ^Read:
(SCC2) Write:
See page 172. _Reset:
SCI Control Register 3 ^Read:
(SCC3) Write:
See page 174. _Reset:
SCI Status Register 1 ^Read:
(SCS1) Write:
See page 175. _Reset:
SCI Status Register 2 ^Read:
(SCS2) Write:
See page 178. _Reset:
SCI Data Register ^Read:
(SCDR) Write:
See page 179. _Reset:
SCI Baud Rate Register ^Read:
(SCBR) Write:
See page 179. _Reset:
Bit 7
LOOPS
0
SCTIE
0
R8
R
U
SCTE
R
1
0
R
0
R7
T7
0
R
0
R
6
5
ENSCI TXINV
0
0
TCIE SCRIE
0
0
T8
R
U
0
TC
SCRF
R
R
1
0
0
0
R
R
0
0
R6
R5
T6
T5
0
R
0
= Reserved
SCP1
0
4
3
M
WAKE
0
0
ILIE
TE
0
0
R
ORIE
0
0
IDLE
OR
R
R
0
0
0
0
R
R
0
0
R4
R3
T4
T3
Unaffected by reset
SCP0
R
0
0
U = Unaffected
Figure 12-2. SCI I/O Register Summary
2
ILTY
0
RE
0
NEIE
0
NF
R
0
0
R
0
R2
T2
SCR2
0
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
12.3 Functional Description
Figure 12-3 shows the structure of the SCI module. The SCI allows full-duplex,
asynchronous, NRZ serial communication between the MCU and remote devices,
including other MCUs. The transmitter and receiver of the SCI operate
independently, although they use the same baud rate generator. During normal
operation, the CPU monitors the status of the SCI, writes the data to be
transmitted, and processes received data.
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
157