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MC68HC705C9ACFN Datasheet(PDF) 84 Page - Freescale Semiconductor, Inc

Part # MC68HC705C9ACFN
Description  General Release Specification
PDF  157 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68HC705C9ACFN Datasheet(HTML) 84 Page - Freescale Semiconductor, Inc

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General Release Specification
Data Format
MC68HC705C9A — Rev. 2.0
Serial Communications Interface (SCI)
9.7 Data Format
Receive data or transmit data is the serial data that is transferred to the
internal data bus from the receive data input pin (RDI) or from the
internal bus to the transmit data output pin (TDO). The
non-return-to-zero (NRZ) data format shown in Figure 9-3 is used and
must meet the following criteria:
•
The idle line is brought to a logic one state prior to
transmission/reception of a character.
•
A start bit (logic zero) is used to indicate the start of a frame.
•
The data is transmitted and received least significant bit first.
•
A stop bit (logic one) is used to indicate the end of a frame. A
frame consists of a start bit, a character of eight or nine data bits,
and a stop bit.
•
A break is defined as the transmission or reception of a low (logic
zero) for at least one complete frame time.
Figure 9-3. Data Format
IDLE LINE
012345678
0
STOP START
START
CONTROL BIT M SELECTS
8- OR 9-BIT DATA
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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