MC68HC705C9A_1 Datasheet, PDF (89/157 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification
Start Bit Detection
DATA
RDI
EXPECTED STOP
ARTIFICIAL EDGE
DATA
START BIT
DATA SAMPLES
a) Case 1: Receive line low during artificial edge
DATA
RDI
EXPECTED STOP
START EDGE
DATA
START BIT
DATA SAMPLES
b) Case 2: Receive line high during expected start edge
Figure 9-6. SCI Artificial Start Following a Frame Error
EXPECTED STOP
BREAK
RDI
DETECTED AS VALID START EDGE
START BIT
DATA SAMPLES
START START EDGE
QUALIFIERS VERIFICATION
SAMPLES
Figure 9-7. SCI Start Bit Following a Break
MC68HC705C9A — Rev. 2.0
Serial Communications Interface (SCI)
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