Datasheet

Serial Communications Interface (SCI)
Functional Description
MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA Serial Communications Interface (SCI) 241
18.5.3.2 Character Reception
During an SCI reception, the receive shift register shifts characters in
from the PE1/RxD pin. The SCI data register (SCDR) is the read-only
buffer between the internal data bus and the receive shift register.
After a complete character shifts into the receive shift register, the data
portion of the character transfers to the SCDR. The SCI receiver full bit,
SCRF, in SCI status register 1 (SCS1) becomes set, indicating that the
received byte can be read. If the SCI receive interrupt enable bit, SCRIE,
in SCC2 is also set, the SCRF bit generates a receiver CPU interrupt
request.
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cale Semiconductor,
I
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