MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 229

• Manufacturer Part Number: MC68HC908AS60MFN
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908AS60 — Rev. 1.0
MOTOROLA
SCR1
SCR2
SCR0
SCP1
SCP0
4
SCALER
PRE-
At the start of a transmission, transmitter control logic automatically
loads the transmit shift register with a preamble of logic 1s. After the
preamble shifts out, control logic transfers the SCDR data into the
transmit shift register. A logic 0 start bit automatically goes into the least
significant bit position of the transmit shift register. A logic 1 stop bit goes
into the most significant bit position.
The SCI transmitter empty bit, SCTE, in SCS1 becomes set when the
SCDR transfers a byte to the transmit shift register. The SCTE bit
indicates that the SCDR can accept new data from the internal data bus.
DIVIDER
BAUD
Freescale Semiconductor, Inc.
PEN
PTY
For More Information On This Product,
TXINV
Serial Communications Interface (SCI)
Figure 17-4. SCI Transmitter
GENERATION
Go to: www.freescale.com
16
PARITY
SCTE
SCTIE
TC
TCIE
T8
M
H
8
SCTIE
7
SCTE
TCIE
TC
SCI DATA REGISTER
6
SHIFT REGISTER
INTERNAL BUS
TRANSMIT
5
11-BIT
CONTROL LOGIC
4
TRANSMITTER
3
Serial Communications Interface (SCI)
2
1
LOOPS
ENSCI
SBK
TE
0
L
Functional Description
Technical Data
TxD
229