MC68HC908MR8 Datasheet, PDF (251/372 Pages) Motorola, Inc – Microcontrollers

Serial Communications Interface (SCI)
Functional Description
Addr.
$0038
$0039
$003A
$003B
$003C
$003D
$003E
Register Name
Bit 7 6
5
4
3
2
1 Bit 0
SCI Control Register 1
(SCC1)
Read:
Write:
LOOP
S
ENSCI
TXINV
M
WAKE ILTY PEN
PTY
See page 264.
Reset: 0
0
0
0
0
0
0
0
Read:
SCI Control Register 2
SCTIE TCIE SCRIE ILIE TE
RE RWU SBK
(SCC2) Write:
See page 267.
Reset: 0
0
0
0
0
0
0
0
Read: R8
0
SCI Control Register 3
T8
(SCC3) Write: R
R
See page 270.
Reset: U
U
0
0
ORIE NEIE FEIE PEIE
R
0
0
0
0
0
Read: SCTE TC SCRF IDLE OR NF FE PE
SCI Status Register 1
(SCS1) Write: R
R
R
R
R
R
R
R
See page 271.
Reset: 1
1
0
0
0
0
0
0
Read: 0
0
0
0
0
0
BKF RPF
SCI Status Register 2
(SCS2) Write: R
R
R
R
R
R
R
R
See page 275.
Reset: 0
0
0
0
0
0
0
0
Read: R7
R6
R5
R4
R3
R2
R1
R0
SCI Data Register
(SCDR) Write: T7
T6
T5
T4
T3
T2
T1
T0
See page 276.
Reset:
Unaffected by reset
Read: 0
SCI Baud Rate Register
(SCBR) Write: R
See page 276.
Reset: 0
0
0
SCP1 SCP0
SCR2 SCR1 SCR0
R
R
0
0
0
0
0
0
0
R = Reserved
U = Unaffected
Figure 13-2. SCI I/O Register Summary
13.4.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format
illustrated in Figure 13-3.
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
Serial Communications Interface (SCI)
Technical Data
251