s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 242
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s908ab32ag0cfue
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M68hc08 Microcontrollers
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Freescale Semiconductor, Inc
Datasheet
1.S908AB32AG0CFUE.pdf
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Serial Communications Interface
15.4 Pin Name Conventions
15.5 Functional Description
Technical Data
242
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.
Figure 15-1
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.
•
•
Serial Communications Interface Module (SCI)
RxD (receive data)
TxD (transmit data)
Generic Pin Names:
Full Pin Names:
shows the structure of the SCI module. The SCI allows full-
Table 15-1
Table 15-1. Pin Name Conventions
shows the full names and the generic names
PTE1/RxD
RxD
MC68HC908AB32
Freescale Semiconductor
PTE0/TxD
TxD
—
Rev. 1.1
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