mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 250

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

18.4 Pin Name Conventions
18.5 Functional Description
Advance Information
250
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 18-1
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 ($001E). Source
selection values are shown in
•
•
RxD (receive data)
TxD (transmit data)
Generic Pin Names:
Full Pin Names:
shows the structure of the SCI module. The SCI allows full-
Table 18-1
Table 18-1. Pin Name Conventions
shows the full names and the generic names
Figure
18-1.
PTE1/RxD
RxD
MC68HC908GP20
Freescale Semiconductor
PTE0/TxD
TxD
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Rev 2.1