MC908GR8CDWE Datasheet, PDF (237/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Serial Communications Interface (SCI)
Functional Description
SCIBDSRC
FROM
CONFIG2
CGMXCLK
IT12
A
B
SL
X
SL = 0 => X = A
SL = 1 => X = B
INTERNAL BUS
÷4
PRE- BAUD
SCALER DIVIDER
÷ 16
SCP1
SCP0
SCR1
SCR2
SCR0
TXINV
SCI DATA REGISTER
11-BIT
TRANSMIT
SHIFT REGISTER
H876543210L
M
PEN
PARITY
PTY
GENERATION
T8
DMATE
DMATE
SCTIE
SCTE
DMATE
SCTE
SCTIE
TC
TCIE
TRANSMITTER
CONTROL LOGIC
SCTE
SCTIE
TC
TCIE
SBK
LOOPS
ENSCI
TE
Figure 18-4. SCI Transmitter
PE2/TxD
18.5.2.1 Character Length
The transmitter 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 transmitting 9-bit data, bit T8 in SCI control register 3 (SCC3) is
the ninth bit (bit 8).
MC68HC908GR8 — Rev 4.0
MOTOROLA
Serial Communications Interface (SCI)
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Technical Data
237