MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 213
MC68HC908AP16CFA
Manufacturer Part Number
MC68HC908AP16CFA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
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13.3 Pin Name Conventions
13.4 Functional Description
MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
The generic names of the SCI I/O pins are:
SCI I/O (input/output) lines are implemented by sharing parallel I/O port
pins. The full name of an SCI input or output reflects the name of the
shared port pin.
of the SCI I/O pins. The generic pin names appear in the text of this
section.
When the SCI is enabled, the TxD pin is an open-drain output and
requires a pullup resistor to be connected for proper SCI operation.
Figure 13-1
duplex, asynchronous, NRZ serial communication among the MCU and
remote devices, including other MCUs. The transmitter and receiver of
the SCI operate independently, although they use the same baud rate
generator. During normal operation, the CPU monitors the status of the
SCI, writes the data to be transmitted, and processes received data.
The baud rate clock source for the SCI can be selected via the
configuration bit, SCIBDSRC, of the CONFIG2 register ($001D). Source
selection values are shown in
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
RxD (receive data)
TxD (transmit data)
Generic Pin Names:
Full Pin Names:
Go to: www.freescale.com
shows the structure of the SCI module. The SCI allows full-
Table 13-1
Table 13-1. Pin Name Conventions
shows the full names and the generic names
Figure
Serial Communications Interface Module (SCI)
13-1.
PTB3/RxD
RxD
Pin Name Conventions
PTB2/TxD
TxD
Data Sheet
213
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