mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 210

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Serial Communications Interface
12.4 Pin Name Conventions
12.5 Functional Description
Technical Data
210
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 12-1
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 is the OSCDCLK from the
oscillator circuit, which is two times the crystal clock, OSCXCLK.
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•
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 12-1
Table 12-1. Pin Name Conventions
shows the full names and the generic names
PTC1/RxD
RxD
MC68HC908JB16
Freescale Semiconductor
PTC0/TxD
TxD
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Rev. 1.1