mc68hc908gr8vp Freescale Semiconductor, Inc, mc68hc908gr8vp Datasheet - Page 168

• Manufacturer Part Number: mc68hc908gr8vp
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface (SCI)
18.4.3.1 Character Length
The receiver can accommodate either 8-bit or 9-bit data. The state of the M bit in SCI control register 1
(SCC1) determines character length. When receiving 9-bit data, bit R8 in SCI control register 3 (SCC3)
is the ninth bit (bit 8). When receiving 8-bit data, bit R8 is a copy of the eighth bit (bit 7).
168
CGMXCLK
IT12
SL = 0 => X = A
SL = 1 => X = B
SCIBDSRC
CONFIG2
A
B
FROM
SL
X
SCP1
SCP0
÷ 4
SCALER
WAKE
ILTY
PEN
BKF
RPF
PTY
PE1/RxD
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
PRE-
M
Figure 18-5. SCI Receiver Block Diagram
DIVIDER
BAUD
ALL 0s
CHECKING
WAKEUP
IDLE
ILIE
DMARE
SCRF
SCRIE
DMARE
SCRF
SCRIE
DMARE
OR
ORIE
NF
NEIE
FE
FEIE
PE
PEIE
PARITY
LOGIC
RECOVERY
SCR1
SCR2
SCR0
DATA
÷ 16
INTERNAL BUS
H
8
7
RECEIVE SHIFT REGISTER
SCI DATA REGISTER
6
5
11-BIT
DMARE
SCRIE
SCRF
ORIE
IDLE
NEIE
FEIE
PEIE
ILIE
4
OR
NF
PE
R8
FE
3
Freescale Semiconductor
2
1
0
L
RWU